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When does patent expire for cialis?

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2019
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If Patent fees are not paid does the patent expire?

Yes, eventually. Under most patent laws there are extension of time provisions. For example, for renewal/annuity fees patentee are generally given at least 6 monthst after the

How do patents expire?

This information describes only U.S. Patents. For utility applications filed on or after June 8, 1995, the patent expires 20 years from the filing date of the earliest U.S. ap

When does the drug patent for singulair expire?

The original patent expiration date for Patent Number 5,565,473 (SINGULAIR- montelukast sodium by Merck) was 30-Nov-2010 but it was extended 430 days to 03-Feb-2012. Generic f

How long before a patent expires?

Patents that issued prior to or on June 7, 1978 had a term that was 17 years from the issue date. These patents have all expired. Patents that were filed after June 7, 1978 a

Do patents expire?

Yes. They are initially good for 20 years, but may be renewed. In the USA and most other countries, expired patents cannot be renewed and the invention is permanently "public

When does the patent for Benicar expire?

It is currently protected in the United States by a patent that prevents any generic Benicar from being manufactured. The first patent for Benicar currently expires in October

What happens to a drug after the patent expires?

When the patent expires on a drug it becomes a "generic", meaning that anyone anywhere can make, use, sell and import the identical drug in that country without needing a lice