Expired Canadian patentCanada
Reinforced cement
CA 1236127 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Carney, Thomas E.; Logullo, Francis M. Sr.; Champion, Allan 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
TITLE, Reinforced Cement, ABSTRACT, Cement product reinforced with p-aramid or acrylic fiber coated with certain sulfonyl azides.
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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.
FiledAugust 13, 1985
GrantedMay 3, 1988
Term endedMay 3, 2005
Patent numberCA 1236127 A
Classification (IPC)C04B16/06 +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.