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Expired Canadian patentCanada

Preventing agent for human immunodeficiency virus infection comprising menfegol

CA 1333571 C · Owner: Miyamoto, Tsutomu · Inventors: Igarashi, Hisanaga; Miyamoto, Tsutomu; Sugiyama, Hidenori

CIPO record

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Abstract From the Canadian patent

Preventing agent for a human immunodeficiency virus infection contains menfegol as an active ingredient. The preventing agent may be in the form of a foaming tablet a jelly preparation, vaginal suppository or ointment. A condom applied with the jelly preparation is also disclosed.

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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

  • Granted December 20, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 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.
FiledMay 24, 1989
GrantedDecember 20, 1994
Term endedDecember 20, 2011
Patent numberCA 1333571 C
Classification (IPC)A61K31/08 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMay 24, 1989Patent grantedDec 20, 1994Term endedDec 20, 2011

Sources & verification

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