Expired Canadian patentCanada
Nylon containing metal salts
CA 1283236 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 room temperature dyeable polyamide fiber with low spherulites containing 1-6% nylon 6, 94-99% nylon 66 and 0.001-2% of a highly reactive metal, preferably calcium and the process for making the fiber are disclosed. RD-3640
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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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 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
GrantedApril 16, 1991
Term endedApril 16, 2008
Patent numberCA 1283236 C
Classification (IPC)D01F6/80 +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.