Process for producing environmentally degradable compositions
CA 1061037 A · Owner: Union Carbide Corporation · Inventors: Potts, James E.; Sracic, Albert M.; Cornell, Stephen W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A two step process for producing a degradable polymer based composition which comprises a) dryblending a masterbatch of ethylene polymer, antioxidant and autooxidative susceptible additive with a masterbatch of such polymer, antioxidant and salt of at least one polyvalent metal having an atomic number of 21 to 30 39 to 48 or, 57 to 71 and then b) melt blending the dry blend. Cross References To Related Patent Applications This patent application is a division of patent application Serial No. 150,087 filed August 24 1972. S P E C I F I C A T I O N, 1.
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 August 21, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 21, 1996.
- 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.