Expired Canadian patentCanada
Melt processable optically anisotropic polymers
CA 1323879 C · Owner: Sieloff, Gloria M. · Inventors: Sieloff, Gloria M.; Willard, G. Fred; Lee, David M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Melt spinnable, liquid crystal aromatic polyesters which are optically anisotropic in the melt phase are provided.
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 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 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.
FiledFebruary 15, 1985
GrantedNovember 2, 1993
Term endedNovember 2, 2010
Patent numberCA 1323879 C
Classification (IPC)C07C69/82 +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.