Expired Canadian patentCanada
Oxidized carbonaceous materials and vulcanized and vulcanizable rubber compositions reinforced with such carbonaceous materials
CA 1207931 A · Owner: Trw Inc. · Inventors: Martin, Jon W.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Oxidized carbonaceous materials suitable for reinforcing such diene rubbers as styrene-butadiene rubber and natural rubber include carbon oxidized iron, dispersed in, intimately associated with and at lease partially bonded to the carbon, and hydrogen.
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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 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 13, 1983
GrantedJuly 15, 1986
Term endedJuly 15, 2003
Patent numberCA 1207931 A
Classification (IPC)C08K7/08 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.