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Expired Canadian patentCanada

Lignosulfonate based pharmacologic agent with anti- coagulant and anti-thrombotic activity

CA 1323308 C · Owner: Samson, Russell H. · Inventors: Hollis, John W. Jr.; Samson, Russell H.

CIPO record

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Abstract From the Canadian patent

Abstract of the Disclosure, A lignosulfonate useful pharamcologically as an anti-thrombotic that inhibits deep venous thrombophlebitis without effecting blood coagulation and, which causes no apparent increased bleeding or side effects. The lignosulfonate is isolated from softwood spent sulfite liquor, and is administered in low dosages of from about 0.05 to about 1.0 mg/ml of blood. A method of making and administering the lignosulfonate 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 October 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 19, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 11, 1988
GrantedOctober 19, 1993
Term endedOctober 19, 2010
Patent numberCA 1323308 C
Classification (IPC)C08H7/00

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedAug 11, 1988Patent grantedOct 19, 1993Term endedOct 19, 2010

Sources & verification

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