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Expired Canadian patentCanada

Tris(aminophenylthiomethyl)-1,3,5,-trialkylbenzenes

CA 1112669 A · Owner: M & T Chemicals Inc. · Inventors: Karoly, Gabriel

CIPO record

Overview

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

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Abstract From the Canadian patent

Abstract of the Disclosure - This invention pertains to novel aromatic, sulfur-containing triamines of the general formula, wherein R1, R2 and R3 are each alkyl containing from 1 to 3 carbon atoms and Y is , . The present compounds are useful crosslinking agents that significantly decrease the curing time of elastomeric urethane/urea copolymers. -i-

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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 November 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 1998.
  • 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 4, 1979
GrantedNovember 17, 1981
Term endedNovember 17, 1998
Patent numberCA 1112669 A
Classification (IPC)C08G18/10

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJune 4, 1979Patent grantedNov 17, 1981Term endedNov 17, 1998

Sources & verification

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