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Expired Canadian patentCanada

(acyloxyalkyl)carbamates as bioreversible latentiating groups

CA 1330995 C · Owner: Merck & Co. Inc. · Inventors: Alexander, Jose

CIPO record

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

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Abstract From the Canadian patent

This invention relates to novel, (acyloxyalkoxy)carbonyl derivatives as bioreversible prodrug moieties for primary and secondary amine functions in drugs having a primary or secondary amine function thereon. Hydrolytic enzymes are used to trigger the regeneration of the parent amine drug of the carbamate prodrug moiety. The case also contains pharmaceutical composition, method of treatment and process claims. The novel (acyloxy alkoxy) carbonyl derivatives of the present invention are of the following formula: wherein RR'N represents a primary, or secondary amine pharmaceutical; R1 and R2 are the same or different and are selected from the group consisting, of hydrogen and substituted …

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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 July 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 21, 1984
GrantedJuly 26, 1994
Term endedJuly 26, 2011
Patent numberCA 1330995 C
Classification (IPC)C07C271/10 +2 more

Timeline

Timeline From CIPO dates

198519881991199419972000200320062009Application filedJune 21, 1984Patent grantedJuly 26, 1994Term endedJuly 26, 2011

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