Crisp polypeptides as contraceptives and inhibitors of sperm capacitation
CA 2487419 A1 · Owner: Hamilton, David W. · Inventors: Ensrud, Kathy M.; Roberts, Kenneth P.; Hamilton, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Included in the present invention are methods of inhibiting sperm capacitation, inhibiting the phosphorylation of a protein at tyrosine residues, inhibiting an acrosomal reaction and inhibiting fertilization of an , egg by sperm with the administration of a CRISP polypeptide.
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 May 28, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2025.
- 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.