Expired Canadian patentCanada
Spherulite reduction in polyamides
CA 1281482 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Windley, William Thomas
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for making a polyhexamethylene adipamide fiber with a spherulite rating of 1 is disclosed. A molten polymer of polyhexametbylene adipamide is injected with fluorocarbon and subjected to low shear.
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 March 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 30, 1987
GrantedMarch 12, 1991
Term endedMarch 12, 2008
Patent numberCA 1281482 C
Classification (IPC)D01F6/60 +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.