The term of a patent: the amount of time during which a patent can be enforced.
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2answers
103 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?
2
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1answer
84 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 ...
2
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1answer
176 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!
2
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1answer
97 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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votes
1answer
322 views
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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2answers
158 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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1answer
90 views
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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2answers
130 views
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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5answers
1k views
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 ...
