Expired Canadian patentCanada
Estradienolone derivatives in sustaining pregnancy
CA 1292467 C · Owner: Philip, Anie · Inventors: Philip, Anie; Pearson-Murphy, Beverly
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A newly isolated steroid having the following formula: This compound isolated from the urine of pregnant women is useful in sustaining pregnancy.
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
- Granted November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 9, 1987
GrantedNovember 26, 1991
Term endedNovember 26, 2008
Patent numberCA 1292467 C
Classification (IPC)C07J1/00 +2 more
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.