Hindered phenolic azidoformates antioxidants
CA 1071224 A · Owner: Goodyear Tire And Rubber Company (The) · Inventors: Waisbrot, Samuel W.; Porter, Richard D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Azidoformyl compounds containing a hindered phenolic antioxidant moiety have been found to provide built-in antioxidant protection. They add to and protect polymers including, saturated, unsaturated, linear crystalline and non-linear-, amorphous hydrocarbon polymers copolymers, terpolymers etc. including especially polyethylene polypropylene, polystyrene, and the rubbers such as natural rubbers, ploybutadienes poly-, isoprenes, butadiene-isoprene copolymer butyl rubber, ethylene-, propylene copolymer ethylene-propylene-dicyclopentadiene, terpolymer etc. and blends thereof.
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 February 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 1997.
- 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.