Expired Canadian patentCanada
Pitch carbon fibers and batts
CA 1323472 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Parrish, Robert G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mesophase pitch centrifugally spun as, described over a lip yields upon stabilization and carbonization with or without graphitization carbon fibers with a lamellar microstructure.
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 October 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 1, 1988
GrantedOctober 26, 1993
Term endedOctober 26, 2010
Patent numberCA 1323472 C
Classification (IPC)D01F9/15 +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.