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Expired Canadian patentCanada

Interpolymers of styrene, maleic anhydride and a brominated monomer

CA 1107445 A · Owner: Monsanto Company · Inventors: Lee, Yoon C.

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

Diclosed herein are lnterpolymers of styrene maleic anhydride and, a brominated monomer such as tribromophenyl acrylate. These polymers when formulated with various additives, have a UL-94 rating of at least V-1. The polymers are especially useful for use in radio and T.V. cabinets furniture, appliance housings and other similar applications.

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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 August 18, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 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.
FiledDecember 24, 1976
GrantedAugust 18, 1981
Term endedAugust 18, 1998
Patent numberCA 1107445 A
Classification (IPC)C08F212/08 +2 more

Timeline

Timeline From CIPO dates

19771980198319861989199219951998Application filedDec 24, 1976Patent grantedAug 18, 1981Term endedAug 18, 1998

Sources & verification

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