2-oxa- or -aza-pregnane compounds
CA 1255293 A · Owner: Teikoku Hormone Mfg. Co. · Inventors: Shibata, Kenyu; Shimazawa, Eiichiro; Yamakoshi, Nobuaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound represented by the following formula (I), wherein A represents a hydrogen atom or a lower alkanoyl group, Z represents an oxygen atom or the group in which R represents a hydrogen atom or a lower alkyl group, and X represents a halogen atom the compound being, useful for controlling androgen-dependent diseases par-, ticularly for preventing abortion or for contraception.
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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.