Composition suitable as a rheology-influencing agent, a method for its preparation and its use in coating media
CA 2108438 A1 · Owner: Bederke, Klaus · Inventors: Dahm, Ralf; Kerber, Hermann; Fried, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Herberts Gesellschaft mit beschrankter Haftung ABSTRACT, A composition, its preparation and use as a rheologyinfluencing agent for coating media, containing a mixture which is obtainable by the preparation of A) one or more (meth)acrylic copolymers containing hydroxyl groups and/or one or more polyesters containing hydroxyl groups, with a hydroxyl number of 30 - 200 mg KOH/g and a carboxyl group content corresponding to an acid number of 0 - 50 mg KOH/g and, B) a hydroxyfunctional microdispersion obtainable by preparing a solution of one or more film-forming polyesters containing hydroxyl and/or carboxyl groups and/or (meth)acrylic copolymers containing hydroxyl and/or carboxyl groups, …
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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 October 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 14, 2015.
- 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.