Expired Canadian patentCanada
Novel s-timolol derivative and process for its preparation
CA 2001083 C · Owner: Santen Pharmaceutical Co. Ltd. · Inventors: Peralampi, Markku
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The novel crystalline S-(-)-3-morpholino-4-(3-tert-but amino-2-hydroxypropoxy)-1,2,-thiadlazole hemihydrate (S-timolol hemihydrate) of the formula (see fig I), and a process for the preparation of the novel compound.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 20, 1989 and granted June 15, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 20, 1989
GrantedJune 15, 1999
Term endedOctober 20, 2009
Patent numberCA 2001083 C
Classification (IPC)C07D417/04 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.