Patent Yard Sign in
Expired Canadian patentCanada

Electrically insulating powder for providing wire coating

CA 1238136 A · Owner: Minnesota Mining And Manufacturing Company · Inventors: Guilbert, Curtis R.

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

Abstract, A carboxy-functional curative for epoxy resins comprising the reaction product of trimellitic anhydride and capped epoxy resins, the capped resins comprising a hydantoin diepoxide or a diglycidol ether of bisphenyl A reacted with benzoic acid or phenyl. The curative is used is conjunction with a thermosettable epoxy resin powder composition useful for applying electrically insulating coatings to electrical wire.

Read the whole patent

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 June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 31, 1985
GrantedJune 14, 1988
Term endedJune 14, 2005
Patent numberCA 1238136 A
Classification (IPC)C08G59/22 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJan 31, 1985Patent grantedJune 14, 1988Term endedJune 14, 2005

Sources & verification

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