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Expired Canadian patentCanada

Spiro bridged and unbridged heterocyclic compounds

CA 2039826 C · Owner: Shirin, Ezra · Inventors: Segall, Yoffi; Shirin, Ezra; Meshulam, Haim

CIPO record

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Abstract From the Canadian patent

Compounds (I) and (II), including enantiomers racemates and acid addition and quaternary salts are for, treating diseases of the central and peripheral nervous system (see formula I and II), wherein in formula (I) Q is (CH2)m or C(CH3)2 attached to the 1',4' or 1',5' positions of the six-membered ring (m = 1 2 or, 3.) and in formula (II) Q is two hydrogen atoms (CH2)m or, C(CH3)2 (m = 1, 2 or 3) and n and p are each independently 0 1, 2 or 3, provided that n + p = 2-3; R° is hydrogen methyl or, OH; (see formula III) is (see formula IV) (see formula V), (see formula VI or , VII) R and R' are independently H, NH2, NH-C1-6-alkyl N(C1-6-alkyl)2, C1-6-alkyl, C2-6-alkenyl C2-6-alkynyl, C3-7- …

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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 April 4, 1991 and granted January 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 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.
FiledApril 4, 1991
GrantedJanuary 15, 2002
Term endedApril 4, 2011
Patent numberCA 2039826 C
Classification (IPC)C07D453/00 +2 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedApril 4, 1991Patent grantedJan 15, 2002Term endedApril 4, 2011

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.