14,17.beta.-ETHANO-14.beta.-ESTRATRIENES AND ESTRATETRAENES, PROCESSES FOR THEIR PRODUCTION, AND PHARMACEUTICAL PREPARATIONS CONTAINING THEM
CA 1269102 C · Owner: Bull, James R. · Inventors: Thomson, Russell I.; Schroder, Helmut; Bull, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
14,17.beta.-ethano-14.beta.-estratriene and estratetraene of Formula I (I), wherein, R1 is a hydrogen atom, a methyl or an acyl group of a monocarboxyclic acid of 1 - 12 carbon atoms R2 is a hydrogen atom or an acyl group of a monocarboxylic acid of 1 - 12 carbon atoms, R3 is a hydrogen atom or a methyl group and, is a single or double C-C-bond, show strong estrogenic activity.
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 May 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
- 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.