Patent Yard Sign in
Expired Canadian patentCanada

Phenol substituted gem-diphosphonate derivatives, process for their preparation and pharmaceutical compositions containing them

CA 1338495 C · Owner: Nguyen, Lan · Inventors: Niesor, Eric; Bentzen, Craig; Nguyen, Lan

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

Certain phenol substituted gem-diphosphonate derivatives in pharmaceutical composition are useful for the treatment of hyperlipidemia. The derivatives are produced by condensation of a phenol substituted precursor with a diphosphonate compound.

Read the whole patent

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 July 30, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 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.
FiledMarch 22, 1989
GrantedJuly 30, 1996
Term endedJuly 30, 2013
Patent numberCA 1338495 C
Classification (IPC)C07F9/38 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMarch 22, 1989Patent grantedJuly 30, 1996Term endedJuly 30, 2013

Sources & verification

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