Water dispersible polyamide diethalonamine ester
CA 1303288 C · Owner: Nl Chemicals Inc. · Inventors: Bornack, Walter K. Jr.; Williams, Roy C.; Mcnally, Keith R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
SKP:837, WATER DISPERSIBLE POLYAMIDE DIETHANOLAMINE ESTER Abstract of the Disclosure, The present invention comprises a water dispersible polyamide diethanolamine ester, having the following general structure:, wherein x is an integer of 0-5; R1 is independently at each occurrence an an aliphatic group of up to 40 carbon atoms or polyamide segment; R2 is independently at each occurrence -B-NH-?-B (where B is an aliphatic group of up to 10 carbon atoms), or -(CH2CH2-O-?-E)2 where E is an aliphatic group of up to 10 carbon atoms or the residue of a cyclic carboxylic anhydride bearing at least one free carboxyl group; R3 = -CH2CH2-O-?-E. The product polyamide resin of the present invention …
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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 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 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
Timeline From CIPO dates
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.