Black-pigmented polymeric compositions of matter
CA 1333113 C · Owner: Hercules Incorporated · Inventors: Hara, Shigeyoshi; Dougal, Alvin L. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Black pigmented polymeric compositions comprising units derived from the ring-opening metathesis-catalyst polymerization of one or more norbornene-type monomers in, which the black pigmentation is from about 0.05 to about 25 parts, per 100 parts of monomer by weight of carbon black that, is substantially free of oxygen and a process for making them, are described.
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 November 15, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 15, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.