Process for preparing spirolaxine and spirolaxine methyl ether
CA 2214871 C · Owner: Huang, Liang Hsiung · Inventors: Guadliana, Mark Alan; Huang, Liang Hsiung; Kaneko, Takushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Processes for preparing spirolaxine and spirolaxine methyl ether the , compounds of formulas (I) and (II) respectively comprising fermenting fungi , selected from the group consisting of Sporotrichum pruinosum FD 29585 ATCC , 74327; Sporotrichum pruinosum FD 29454 ATCC 74329; Sporotrichum pruinosum FD 29586, ATCC 74328; and Phanerochaete chrysosporium LN 3576 ATCC 74326. This , invention also relates to a process for preparing spirolaxine comprising fermenting Sporotrichum pruinosum FD 29458 ATCC 74330.
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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 March 30, 1995 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2017.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.