Propanediol derivatives, their production and use
CA 1306462 C · Owner: Takeda Chemical Industries, Ltd. · Inventors: Inoue, Keizo; Tasaka, Akihiro; Nomura, Hiroaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel compounds having the formula: R1-OCH2CH2CH2O-(CH2)n-R2, wherein R1 stands for a higher alkyl group; R2 stands for a primary to tertiary amino group or a quaternary ammonium group; and n denotes an integer of 3 to 10; and salts thereof, have excellent anti-tumor action and therefore are useful as anti-tumor agents.
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 August 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 2009.
- 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.