Ureido derivatives of poly-4-amino-2-carboxy-1-methyl compounds
CA 2050331 C · Owner: Pharmacia S.P.A. · Inventors: Grandi, Maria; Biasoli, Giovanni; Paio, Alfredo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to ureido derivatives of substituted pyrroles of formula (I) wherein each of m and n, being the same is an integer of 1 to 3; W is oxygen of sulphur; each of the B groups which , are the same, is a) a saturated or unsaturated carbo-, cyclic or condensed carbocylic ring substituted by one or more acid groups; b) a saturated or unsaturated, heteromonocyclic or heterobicyclic ring, containing one or more heteroatoms chosen from nitrogen oxygen and sulphur, substituted by one or more acid groups; c) a pyranyl or furanyl sugar residue substituted by one or more acid groups; or d) a -CH2(CHA) r CH2A group wherein each A group, being the same or different is an acid group …
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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 January 7, 1991 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 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.