Ingestible amine functionalized and cross-linked homopolymers with hydrophobic backbone for the lowering of blood cholesterol
CA 2038852 C · Owner: Lowchol Scientific Inc. · Inventors: Brown, George Ronald; Wu, Gaoming; St. Pierre, Leon Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with novel ingestible cross-linked homopolymers having functional groups consisting of linear or branched amines, of the formula: P-NR(CH2)n mN(R)2 or , (Ia) (Ib), and their pharmaceutically acceptable salts of the formulae: P-N+(R)2(CH)nMN+(R)3(m+l)X- (Ic), and, (Id) wherein P represents a hydrophobic, cross-linked and nondigestible homopolymer backbone; R is a hydrogen atom or a lower alkyl radical; X- is a pharmaceutically acceptable anion; m is an integer varying from 1 to 6 inclusive; and n o and p are, independently, integers varying from 2 to 12 inclusive. The amine functionalized and cross-linked homopolymers of the invention are highly efficient …
Read the whole patent
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 March 22, 1991 and granted June 18, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 2013.
- 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.