1-alkyl-, 1-alkenyl- and 1-alkynylaryl-2-amino-1,3-propanediols and related compounds, a process and intermediates for their preparation and theeir use as medicaments
CA 2038029 C · Owner: Hamer, Russell Richard Lee · Inventors: Hamer, Russell Richard Lee; Rauckman, Barbara Seavey; Freed, Brian Scott
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to novel 1-alkyl- 1-alkenyl- and 1-alkynylaryl-, 2-amino-1,3propanediols, intermediates and processes for the preparation thereof. The compounds of the, invention are of the formula I RCH(OR1)CH(NR2R3)R4 (I), wherein R is wherein R5 is, CH3(CH2)mC=C. CH3(CH2)m,CH=CH CH3(CH2)m,CH2CH2, wherein m is 3 to 15 n is 0 to 12, W and X are independently hydrogen (C1-, C8) alkyl, (C1-C8) alkoxy, halogen or trifluoromethyl, and Z is S. O, or C=O: and A is S or O: R1 is hydrogen or wherein, R6 is hydrogen, (C1-C8) alkyl. (C1-C8) alkoxy. or :R2 is hydrogen , (C1-C3) alkyl. R3 is hydrogen (C1-C3) alKyl or wherein R6 is as above: , R4 is , wherein R7 is hydrogen (C1-C8) …
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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 12, 1991 and granted November 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2013.
- 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
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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.