Polyhydroxy phenols and method for preparing the same
CA 1078873 A · Owner: Societa' Italiana Resine S.I.R. S.P.A. · Inventors: Pezzoli, Silvestro; Mazzoleni, Giorgio; Bonsignori, Pierluigi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyhydroxy phenols according to the formula: where R is a hydrocarbon radical containing from 1 to 4 carbon atoms, R1 is the radical , and, R2 is a hydrogen atom or the radical R1. The above polyhydroxy phenols can be used in the preparation of hardened epoxy resins with improved stability or, in the preparation of improved phenolic resins.
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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
- Granted June 3, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 3, 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
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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.