Cured fibrous composites prepared from the resinous reaction products of hydroxy aromatic mono-aldehydes and methylated pyridines or methylated pyrazines, and prepolymers preparedfrom hydroxy aromatic mono-aldehydes and methylated pyrazines
CA 1301758 C · Owner: The Dow Chemical Company · Inventors: Latulip, Randy L.; Swearingen, Loren L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to a thermosettable prepolymer characterized as comprising the resinous reaction product of one or more hydroxy aromatic mono-aldehydes and one or more methylated pyrazines, the methylated pyrazines having the structural formula, wherein R is hydrogen methyl or ethyl and the number of methyl groups on the ring is from 2 to 4.
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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
- 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.