Modified normally liquid, water-soluble polyoxyalkylene polyamines
CA 2061389 A1 · Owner: Huntsman Corporation · Inventors: Cuscurida, Michael; Yeakey, Ernest L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
MODIFIED NORMALLY LIQUID, WATER-SOLUBLE POLYOXYALKYLENE POLYAMINES, (Docket 80,663-F) ABSTRACT OF THE DISCLOSURE, In accordance with the process of the present invention normally liquid, water-soluble poly(oxyethylene/oxypropylene) polyamine products are prepared using an initiator which, may contain oxyethylene groups. In a series of alkoxylation reaction steps the initiator is reacted with predetermined weight percentages of ethylene oxide and propylene oxide said process comprising the steps of:, a. Charging a predetermined percentage of initiator to an alkoxylation reaction zone, b. Alkoxylating said initiator therein with predetermined percentages of ethylene oxide and propylene oxide …
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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 February 18, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 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
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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.