Polyamines and polypeptides useful as antagonists of excitatory amino acid neurotransmitters and/or as blockers of calcium channels
CA 2015505 C · Owner: Saccomano, Nicholas Alex · Inventors: Volkmann, Robert Alfred; Saccomano, Nicholas Alex
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to certain polyamines and polypeptides found to be present in the venom of the Agelenopsis aperta spider. The polyamines of this invention and the salts thereof antagonize excitatory amino acid neurotransmitters, which neurotransmitters affect cells of various organisms and are useful in antagonizing said neurotransmitters, per se in the, treatment of excitatory amino acid neurotransmitter mediated diseases and conditions and in the control of invertebrate pests. The polypeptides of this invention and one of said polyamines and the salts thereof block calcium channels in cells of various organisms and are useful in blocking said calcium channels in cells per, se, in …
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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 April 26, 1990 and granted March 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2012.
- 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.