The term of a patent: the amount of time during which a patent can be enforced.

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Original Patent document

In reference to the patent: US925691 Dear Sirs, The gentleman referenced as the inventor, and holder of this patent, is my Great Grandfather - Glyndon Abraham Freer. I have a copy of the original ...
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patent expiration date for US5523225 [duplicate]

In reference to the patent: US5523225 When does this patent expire ?
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Patent Duration [duplicate]

Is there an expiration date for this patent? If so, when does it expire? In reference to the patent: US8723425
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When do the patents on RC6 (U.S. Patent 5,724,428 and U.S. Patent 5,835,600) expire?

I have found that the two patents placed on the RC6 algorithm are U.S. Patent 5,724,428 and U.S. Patent 5,835,600, but I'm having trouble determining the earliest date at which they will have both ...
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32 views

What copyright or patent infringements could I step into by remaking an old game?

There is a very old game from Westwood Studios currently owned by Electronic Arts I'd like to remake, but I don't know if I can turn it into a business due to the related copyrights and possible ...
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0answers
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Expiration and Geographical limitations

In reference to the patent: US20040213007 When does this patent expire, and are there geographical limitations? It seems that this invention was patented in a foreign country. Does that make the ...
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How do I re-patent a product similar to one that's had its patent expire?

In reference to the patent: US5809590 It appears as though this patent is expired, and I wish to re-patent a similar product. How do I go about doing this?
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Assigning Patents To Different People For Same Device For Over 100 Years, US 8567565 B2

Chain lubricating apparatus and method US 8567565 B2 This appears to be the same idea repackaged by different individuals for over 100 years. Is this a common practice? Also can BKC renew the ...
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1answer
40 views

Has patent US 5,195,917 A expired?

Can anyone tell me if this patent has expired or how I can find out if it has? US 5,195,917 A tear apart stress relief doll. How long is a patent good for, is it the same for every patented ...
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1answer
65 views

How often are patents terminally disclaimed?

How many patents have terminal disclaimers (i.e., truncation in their time to expiry)? I am looking for a percentage of the total population of patents granted. A rough estimate + source is good ...
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31 views

When do the rights granted by a design patent vest in the USA?

Do they vest once the design patent is granted or do they go back to some period earlier (retroactive)? I’m asking specifically about design patents.
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Patent Expiration

In reference to the patent: US 5,858,064 I think this patent has expired based on the priority date of August 22, 1995. Is that correct?
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When will patent US 6,797,357 expire?

In reference to patent US 6,797,357, "Three dimensional structures useful as cleaning sheets", when will it expire?
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Is this Patent still in effect? [duplicate]

Is this patent still in effect? Is it expired? In reference to the patent: US1119732
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Filing, CIP, Con, PCT, Priority, etc and Expiration Date

I was wondering if someone would kindly help me figure out how to determine the expiration dates for a patent family, and which and how each is still in effect and until when. (I don't have any patent ...
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0answers
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Patent status information [duplicate]

In reference to the patent: US3731965 Is this patent current or expired? If expired is it public domain or can I patent it? If it is current where can I find this item for purchase?
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0answers
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When a patent goes into Lapse status in European countries can it be renewed later?

When a patent goes into Lapse status in European countries can it be renewed later? What are the different status a patent can have that make it enforceable at present or in the future?
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Why is there no requirement that a foreign entity manufactures / licenses and / or offer to sell in a territory?

Just wondering why there is no requirement for foreign entities seeking to patent an idea / technology in a territory be obliged to manufacture, license and / or offer to sell a product based on the ...
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1answer
33 views

How do we reinstate our patent US 5,341,526

I am the owner of patent US 5,341,526. Our mother was the original inventor and was going to pay the maintenance fees, but never did. So, we were told that we lost the patent. Could you please tell ...
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1answer
621 views

Provisional Patent in Europe

I want to see if an idea can work in the European market, but I want to protect it. Can I fill a provisional patent application in Europe, and then if the idea does not work just disregard the patent ...
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1answer
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Timelines for patenting

I would like to know about timelines for patents. How long does it take to patent a product and how do I start the process? At what stage of the patenting process can I start showing my product ...
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Patent US 5803317 [duplicate]

In reference to the patent: US5803317 When does this patent expire?
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1answer
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Approval and expiry date

Has patent EP2298800A1 been approved and if so, what is the expiry date?
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expiring date of the US 6905424 B2 [duplicate]

When does US Patent 6,905,424 expire?
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Are the enclosed patents still valid?

Are those patents still valid: US7774976 US2009000183 US7774976 Also cited under: DE10259651 (as we know, it expired due to no-payment, so how can above patents be applied for or granted?)
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Is this patent still valid? Aircraft trash compactor and box US 4620479 A

Is US4620479 patent number still valid or can this product be manufactured free on the open market?
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4answers
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How can you renew an expired patent?

I've been researching on how to renew an expired patent, and all I get for results are maintenance fees for patents filed on or after December 12th 1980. I am hoping someone would have an idea or an ...
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1answer
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Who has the rights this patent?

My grandfather is the inventor. My late father and his son told me my grandfather sold the patent, but I don't see that someone else holds it. Could you tell me more about it?
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Was EP 0198288 A3 renewed?

According to the publication date, this patent should have expired in 2006. The last legal event recorded however is a correction made in 2007. Does this mean that is was renewed? Would an inventor ...
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1answer
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Is US 5278057 A still in force?

This is a continuation of patent EP 0198288 A3. The last legal event recorded for the continuation patent is an expiration in 2006 due to failure to pay a maintenance fee. Does this mean that the ...
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how many years is patent good for 6092612

how long is this patent protection 6092612
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What if the inventor of the idea is dead?

Some of these patents have been patent back in the mid 1900's. How do I know if these people are still alive? And if not, how can I take over the patent? Are the patents moved on to the next family ...
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162 views

Someone patent a design 2 years after I published a research papers.

I wanted to develop a product based on my Ph.D. research carried out in 2002. I published a paper about my design in "Review of Scientific Instruments" in 2002. However, I just found out that a ...
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169 views

If I have already publicized my technology could someone else patent it?

While in college, I merged two forms of open to the public technology and created a new method for sharing information for a particular use that has not been used before and it's not patented. I ...
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103 views

What is enforceable on this patent?

For patent # 5,584,962 I have developed a tensioned hub for the supply roll that fits these machines. This mainly concerns figure 8. My hub design is different. My questions are: How can I tell ...
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1answer
63 views

Expiration date of US 5,618,582?

I want to know the date of expiration of VanWinkel's Liquid Mask patent US 5,618,582.
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Is an expired patent in the public domain?

From what I've been reading about US patents, once a patent has expired, it enters the public domain and can be freely used. The patent I was looking at was filed on 1/1999 and published in 10/2000. ...
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Looking for information about inventor of us20050211962 [duplicate]

How can I reach the inventor of this patent application? Patent Application: us20050211962 Looking for a phone number or email address to ask implementation details about the invention described in ...
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What is the expiration date of patent US 6,676,109?

Is patent US 6,676,109 for a rotary valve in favor of Kitz Corporation a design patent or a utility patent? What is the expiration date of the patent?
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145 views

Is this patent still active? [closed]

US6933362 How could a researcher use the sequence of this intein molecule to synthesize it now for scientific and research purpose? Is this patent still active?
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1answer
319 views

When can I start using an expiring patent?

I came up with an idea for a new product and began researching the process for getting a patent etc. Along the way I found that a patent existed for this idea. After speaking to the patent owner they ...
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150 views

What steps does a patent application follow?

Sorry for this extremely basic question, but it does not appear to be a duplicate. What states may a patent be in? How does it get from one state to the next? My understanding is the flow goes ...
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121 views

Is Patent US4820036 expired?

This patent says it is lapsed. Was this patent actually issued? It says failure to pay fees. I looked it up on the US Patent website and it said it could not be found. Can anyone help me here? ...
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Can Patent US 5350471 be re-patented after expiration?

Patent No US5350471 "Production of cross-laminated film from tube" was given patent in year 1993 now in 2013 this patent will automatically expire as it completing 20 years. Can this patent be ...
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Is it possible to quickly kill existing patents?

My biggest fear is that all the really valuable and very broad patents that qualify as crap have been granted, and we're merely in the midst of the "long tail" of patent applications. How can we fix ...
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How long is this plant patent protection USPP9753P, 20 or 25 years

Avocado tree called Lamb/Hass plant patent US PP9,753 P. Is this a 20 or 25 year protection.
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How do you determine a patent expiration date (US 7,055,282 B2)?

How can I determine the lifetime of a patent? For example, how can I tell when Patent US 7,055,282 B2 expires?
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1answer
207 views

When does US Patent 5,720,421 expire?

I am trying to determine when US Patent Number 5,720,421 will expire. Since it was pending before June 8, 1995, I would assume that it has a term of 17 years from the filing date and will be valid ...