Soluble polyimidesiloxanes and methods for their preparation and use
CA 1299801 C · Owner: Occidental Chemical Corporation · Inventors: Lee, Chung J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
March 23, 1987, JFM/CJL/rag NOVEL SOLUBLE POLYIMIDESILOXANES AND, METHODS FOR THEIR PREPARATION AND USE ABSTRACT, Fully imidized polyimidisiloxanes which are based on oxydiphthalic anhydride are soluble in diglyme which gives them particular utility in the micro-electronics industry. The polymers are prepared from oxydiphthalic anhydride a difunctional siloxane, monomer and an organic diamine that provides an assymetrical structure in the polyimidesiloxane polymer chain. The polyimidesiloxane can be prepared with functional groups which render them directly curable. The polyimidesiloxanes can also be prepared with functional groups which when reacted with an unsaturated compound renders the …
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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 April 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 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.