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Expired Canadian patentCanada

Spray dried acetaminophen

CA 1298199 C · Owner: Reuter, Gerald Louis · Inventors: Reuter, Gerald Louis; Blank, Robert George

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

AHP-8826-f, ABSTRACT, SPRAY DRIED ACETAMINOPHEN A therapeutic taste-neutral powder form of acetaminophen is obtained byspray-drying a suspension of colloidal silica in a lower alkanol solution of acetaminophen and ethyl cellulose. The powder can be formulated into fast dissolving dosage forms chewable tablets and the, like.

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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 March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 9, 1987
GrantedMarch 31, 1992
Term endedMarch 31, 2009
Patent numberCA 1298199 C
Classification (IPC)A61K31/16 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 9, 1987Patent grantedMarch 31, 1992Term endedMarch 31, 2009

Sources & verification

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