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Expired Canadian patentCanada

Curing agents for epoxide resins and compositions containing them

CA 1180494 A · Owner: Ciba-Geigy Investments Ltd. · Inventors: Andrews, Christopher M.

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Abstract From the Canadian patent

Curable compositions contain an epoxide resin and as curing, agent, a mixture of, (a) a silamine of the general formula wherein, either m represents 1, in which case R1 represents the divalent residue of an aromatic, aliphatic, araliphatic or, cycloaliphatic diprimary amine after removal of two primary amino groups, and n represents zero or an integer of from 1 to 10 or m represents 2, in which case R1 represents the trivalent residue of an aliphatic triprimary amine after removal of the three primary amino groups, and n represents zero and, R2, R3, R4, R5, and R6, which may be the same or different represent alkyl or aryl groups, and, (b) a substantially anhydrous organic acid or a phenol. …

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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 January 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 2002.
  • 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 28, 1982
GrantedJanuary 2, 1985
Term endedJanuary 2, 2002
Patent numberCA 1180494 A
Classification (IPC)C08K5/54 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedJune 28, 1982Patent grantedJan 2, 1985Term endedJan 2, 2002

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