Elastomeric composition having improved cut growth resistance
CA 1291284 C · Owner: Wingrove, Donald Earl · Inventors: Wingrove, Donald Earl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Elastomeric compositions produced by curing blends comprising (A) a highly unsaturated rubber; (B) a saturated rubber; (C) a phenylenediamine compound and (D) a curing agent comprised of (i) sulfur and/or a sulfur donor compound, (ii) a sulfur cure accelerator and (iii), a peroxide curative; wherein between about 1 and about 10 parts by weight of (C) per 100 parts by weight of (A) plus (B) is present exhibit unexpectedly high resistance to cut growth. In addition, a process for producing such rubber compositions is disclosed.
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 October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2008.
- 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.