Expired Canadian patentCanada
Low temperature plasticizers
CA 1108640 A · Owner: Thiokol Corporation · Inventors: Barclay, Robert; Hoffman, Robert F.; Bertozzi, Eugene R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Diesters of succinic glutaric, adipic, and phthalic, acid with hexyloxyethoxyethanol or butoxyethoxyethoxyethanol are disclosed. They are useful as plasticizers with extended temperature ranges in elastomers.
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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 September 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 16, 1977
GrantedSeptember 8, 1981
Term endedSeptember 8, 1998
Patent numberCA 1108640 A
Classification (IPC)C07C69/34 +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.