Prostaglandins
CA 1269936 C · Owner: British Technology Group Limited · Inventors: Troughton, Kay M.; Senior, Judith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of use in the treatment of neoplasias for, example oestrogen-dependent neoplasias are compounds of formula, (I), (I), wherein represents one of the divalent cyclic groups the letters a and b indicating in each case the points of attachment of the substituents R1 and C(R2)=N=Nh.CS.NH-R3 respectively; R1 is a 6-carboxyhex-2-enyl group or modification thereof in which the group is altered by one or an appropriate, combination of two or more of the following: (a) alteration of, the position of the double bond to the 3,4-position (b) reduction, of the double bond, (c) alteration of the chain length through a decrease or an increase of one methylene group and (d) formation, of an …
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 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 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.