Organic phosphates and their preparation
CA 2070123 A1 · Owner: Kolich, Charles H. · Inventors: Kolich, Charles H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case EP-6351, ORGANIC PHOSPHATES AND THEIR PREPARATION Abstract of the Disclosure, Compositions comprising a combination of (i) at least one hydrocarbon-soluble aryl phosphate of the formula (RO)3PO, wherein each R is, independently phenyl or an alkyl-, substituted phenyl group; and (ii) at least one hydrocarbonsoluble aryl polyphosphate of the formula wherein each R is, independently, phenyl or an alkylsubstituted phenyl group, Ar is m-phenylene or an alkylsubstituted m-phenylene group, and n is from 1 to 4. The combination contains from 2 to 30% by weight of component (i). These compositions are made by (a) reacting about 1.9 to about 2.1 equivalents of phenol or alkyl-substituted phenol …
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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
- Filed June 1, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2014.
- 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.