Cyclic phosphamide derivatives
CA 1051914 A · Owner: Shionogi And Co. · Inventors: Takamizawa, Akira; Iwata, Tsuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cyclic phosphamide derivatives of the general formula: wherein X and Y each represents a halogen atom or lower alkanesulfonyloxy (excepting the case in which both X and Y are halogen atoms and both X and Y are lower alkanesulfonyloxys), and R represents a lower alkyl, being useful as medicaments exhibiting antitumor and immunosuppressive activities.
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 April 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 1996.
- 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.