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

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How to write for a patent right

How do I write for a patent right on a unique idea I have developed for science project
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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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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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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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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

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?

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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Shows up as filed in 1682 www.google.com/patents/US4381219

Shows up as filed in 1682 US4381219 False filing date in Google database.
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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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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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82 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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Can an expired patent be reinstated if the inventor of the patent has died?

Can an expired patent be re-instated if the inventor of the patent has died? Background: The inventor died 3.5 years ago. I am not sure who the patent was passed onto upon his death but the patent ...
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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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2answers
1k views

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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1answer
133 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 ...
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218 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? Thank you!
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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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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 software 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 ...