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Expired Canadian patentCanada

(2,3,9,9a-tetrahydro-3-oxo-9a-substituted-1h-fluoren-7-yl) oxy ethanimidamides and (2,3,9,9a-tetrahydro-3-oxo-9a- substituted-1h-fluoren-7-yl) oxy-ethanimidic acid hydrazides,their derivatives and their salts

CA 1284329 C · Owner: Merck & Co. Inc. · Inventors: Woltersdorf, Otto W. Jr; Cragoe, Edward J. Jr.

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Abstract From the Canadian patent

TITLE OF THE INVENTION, (2,3,9,9a-TETRAHYDRO-3-OXO-9a-SUBSTITUTED-lH- FLUOREN-7-YL)OXYETHANIMIDAMIDES AND (2,3,9,9a- TETABYDRO-3-OXO-9a-SUBSTITUTED-lH-FLUOREN-7-YL)OXY- ETHANIMIDIC ACID HYDRAZIDES, THEIR DERIVATIYES AND THEIR SALTS, ABSTRACT OF THE DISCLOSURE The invention relates to novel, (2,3,9,9a-tetrahydro-3-oxo-9a-substituted-lHfluoren-yl)oxyethanimidamldes and (2,3,9,9a-tetrahydro-3-oxo-9a-substituted-1H-fluoren-7-yl)oxyethanimidic acid hydrazide, their derivatives and their salts. The compounds are useful for the treatment and prevention of injury to the brain and of edema due to head trauma, stroke (particularly ischemic), arrested breathing, cardiac arrest Reye's, syndrome, …

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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 May 21, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 21, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 18, 1986
GrantedMay 21, 1991
Term endedMay 21, 2008
Patent numberCA 1284329 C
Classification (IPC)C07C257/14 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedSep 18, 1986Patent grantedMay 21, 1991Term endedMay 21, 2008

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