Cationic electrocoating compositions, method of making, and use
CA 2262472 C · Owner: Kaufman, Marvin L. · Inventors: Karabin, Richard F.; O'Neill, Patrick; Kaufman, Marvin L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrodepositable composition that has: (A) an active hydrogen-containing cationic resin, electrodepositable on a cathode having: (1) a polyepoxide; , (2) an oxygen-substituted diamine compound having formula (I) where n is an integer from 2 to 4; and where R1 or R2 are the same or different and either one or both contain at least one oxygen and are alkyl cycloalkyl, substituted , alkyl, or substituted cycloalkyl having from 1 to 6 carbon atoms or R1 and R2 , are alkanol groups having from 2 to 6 carbon atoms or R1, R2, and the N atom , form a cyclic group which is substituted or unsubstituted such as morpholine and 1-(3-aminopropyl)imidazole; and (B) at least partially blocked …
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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 July 29, 1997 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2019.
- 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.