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Expired Canadian patentCanada

4-chloroazetidinone-1-(2'-3'-dichloroisopropyl) acetates and process for preparing same

CA 1072564 A · Owner: Connlab Holdings Limited · Inventors: Micetich, Ronald G.; Morin, Robert B.; Wilson, Kenneth E.

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Abstract From the Canadian patent

The invention relates to novel azetidinones of tne general formula:, wherein R stands for lower alkyl phenyl, phenyloxyloweralkyl, phenylloweralkyl 2-thiophenemethyl, 5-tetrazolylmethyl, R3Oand R3S-, wherein R3 stands for lower alkyl phenyl or phenyl-, loweralkyl; R1 is hydrogen or a cleavable radical selected from lower alkyl, loweralkoxymethyl, 2,2,2-trichloroethyl benzyl, p-halobenzyl, p-nitrobenzyl and p-methoxybenzyl benz-, hydryl and trimethylsilyl; R2 is hydrogen or methoxy; X is SCl SBr or -OH in which case the C3-sidechain is better represented as the amide RCONH- group; Y is chloro or bromo; and R?=N may also be taken as phthalimido. These novel compounds possess antibacterial …

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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 February 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 26, 1980
Term endedFebruary 26, 1997
Patent numberCA 1072564 A
Classification (IPC)C07D205/08 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedFeb 26, 1980Term endedFeb 26, 1997

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