Rubber stock containing phenoxyacetic acid
CA 2094668 A1 · Owner: Segatta, Thomas Joseph · Inventors: Sandstrom, Paul Harry; Segatta, Thomas Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a rubber stock containing 0.1 to 10.0 phr of phenoxyacetic acid. Addition of the phenoxyacetic acid to a rubber stock increases the low strain stiffness properties of the rubber stock and results in increased treadwear when the stock is used in tread stocks. The phenoxyacetic acid may also be used in a rubber stock as a methylene acceptor or resorcinol replacement. In addition the, phenoxyacetic acid functions as a silica coupling agent and provides lower viscosities for processing the rubber stock compared to rubber stocks containing conventional silane coupling agents.
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
- Filed April 22, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2015.
- 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.