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

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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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53 views

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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Expiration of a patent with improper priority claim

An issued patent I have in mind (patent X, filed in 2003, so subject to 20-year term provisions) says on its face and in its first paragraph that it is a CIP of many patents, but I will just name two ...
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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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28 views

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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2answers
35 views

how many years is patent good for 6092612

how long is this patent protection 6092612
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Does anyone know when the expiry on Clearblue digital tests expires? [duplicate]

If anyone knows about the patent expiries on digital pregnancy tests that would be a great help
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Has US7052212 been actively maintained?

I would like to know if this patent has been maintained. I would like to know if Joyner has licensed the patent or sold it.
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What should I do with my late father's patents from the 1970's?

I have just come across this information on my late father's patent for an ice-making machine in the 1970's. I am his daughter, and was involved with his business Venturi Refrigeration before his ...
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1answer
39 views

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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what are USPTO patent rules

**strong text**Obtained a design patent on 9/14/2010 want to know if my design patent will fall under the new 2013 1 year extension rule.
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How many owners of this patent are currently living?

It is to my knowledge that all of the living members who created this invention and this patent died in the Malaysian flight. What happens to the patent now? Is it up for grabs again?
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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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1answer
135 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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96 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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Expiration date of patent 5618582?

I want to know the date of expiration of VanWinkel's Liquid Mask patent 5618582.
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3answers
2k views

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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1answer
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Expiry date of patent no 6676109

Is patent US6676109 for a rotary valve in favour of Kitz Corporation a design patent or a utility patent? What is it's expiry date?
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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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259 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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1answer
102 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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1answer
102 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 USPP9753P. Is this a 20 or 25 year protection.
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How do you determine a patent's expiration date?

How do you determine the lifetime of a patent? For example, how can I tell when U.S. Patent 7,055,282 B2 expires?
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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 ...
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248 views

Is this patent US6323569 B1 still valid? Valid till? End date?

I would like to know is patent "US6323569 B1" still valid? its end date?
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161 views

Patent expiration date with multiple publications

I was wondering what a patents Priority date is? If its set to 1997 and it has been published 6 times (the last publish was 2012) when does it expire? The patent I am talking about is US20120221930.
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Expiration date of US5597520

Can 3DSystems sue Formlabs over US Patent 5597520? If it was issued in 1997, wouldn't it have expired in 2007?
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816 views

What is a look back period

For a patent I am looking at, I see it expired on May 2, 2012, but that the owner can continue to "assert the patent after it expires with a look back period of six years" What does this mean?
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Is this toilet bidet patent design expired and now public?

I am new to the world of patents. I wanted to manufacture this toilet bidet in Southern Africa. Would this infringe any patents? Is the patent in the link provided above expired?
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Patent length and breadth

Does a patent have a life span, say 7 years and if a piece of an old patent is used in a new one and much more accurately described and refined is that OK?
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How long are patents valid?

As an independent software programmer it is very tricky and time consuming to understand these patents. I would say it is impossible for me. Do software patents have a lifetime? If they do, it would ...