Polyoxyalkylene polyether amino alcohols containing a tertiary hydroxyl group and flexible polyurethanes made therefrom
CA 1264767 C · Owner: Eastman Kodak Company · Inventors: Klein, Howard P.; Cuscurida, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A TERTIARY HYDROXYL GROUP AND FLEXIBLE POLYURETHANES MADE THEREFROM, (Docket #80,410-F) ABSTRACT OF THE DISCLOSURE, Polyoxyalkylene polyether amino alcohols are prepared which have the following formula: (IV), Wherein, R represents hydrogen or a methyl or an ethyl group, x represents a number having an average value of about 1 to about 4 and n represents a number having an average value of about 1 to about 40. The polyoxyalkylene polyether amino alcohol is prepared by alkoxylating a glycol that contains one tertiary hydroxyl group and also a primary or secondary hydroxyl group in order to form an alkoxylated intermediate and by then reductively aminating the alkoxylated intermediate.
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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 January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
- 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.