Chlorinated polyethylene elastomers
CA 1236250 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Ennis, Royce E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An uncured chlorinated polyethylene elastomer having a molecular weight distribution of about 6-13, as determined by the ratio of where, ?w represents the weight average molecular weight and ?n represents the number average molecular weight a chlorine content of about 20-28% by weight a, Mooney viscosity value, determined according to ASTM D 1646-81, ML(1 + 4) at 100°C, of about 15-36; and optionally, a sulfur content of about 0.2-2% by weight and a process for their preparation.
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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 May 3, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2005.
- 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.