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8 views

Patent expiration date [duplicate]

In reference to the patent: US6224497 when does this patent expire?
3
votes
1answer
64 views

Get the same patent in multiple countries

Say I am an inventor and want to maximize the protection of my invention, so I want to patent the same thing (invention) in as many countries as possible (or at least in the biggest markets like US, ...
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0answers
5 views

when does this patent US5876176 expire? [duplicate]

In reference to the patent: US5876176
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votes
3answers
55 views

EPO publication date

The EPO has so many publication dates for each patent: A1, A2, A3, A4. . . B1, B2, etc. Which should I use as publication date?
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0answers
8 views

When will this Patent expire 5,669,982 [duplicate]

In reference to the patent: US5669982
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0answers
14 views

How can the challenge date of an application be extended?

The challenge on Microsoft's patent US 20130063492 states: Availability for Challenge: Open Until at least Sept 14, 2013 How is the "available for challenge" date obtained? What steps must we ...