Phosponocarboxylate compounds for treating abnormal calcium and phosphate metabolism
CA 2136824 C · Owner: Bayless, Allan Vincent · Inventors: Ebetino, Frank Hallock; Bayless, Allan Vincent; Dansereau, Susan Mary
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to compositions comprising pharmaceuticallyacceptable carriers and a phosphonocarboxylate or a pharmaceutically-acceptable salt thereof having a structure according to , formula (I) wherein (A) (1) A is selected from, the group consisting of hydrogen; halogen ; SR1; R2SR1; amino; hydroxy; and substituted or unsubstituted C1-C8 alkyl; (2) B is (a) NH2; etc. or (B) A and B are covalently linked together with C* to form a monocyclic or bicyclic ring having structure .alpha.. The present invention further relates to novel phosphonocarboxylates and pharmaceutically-acceptable salts thereof. Finally the present invention relates to methods for treating or …
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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 May 27, 1993 and granted August 17, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 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.