Perfluoroalkylnaphthalene compounds
CA 1286320 C · Owner: Ethyl Corporation · Inventors: Brandt, Vernon Omer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel compounds having greatest interest as biologically-active materials for the treatment of diabetic complications in mammals, or intermediates for such materials, are perfluoroalkyl compounds corresponding to the formula:, wherein R and R' are independently selected from chloro fluoro, nitro, hydroxy, and alkyl and alkoxy substituents containing 1-6 carbons; Q is -CN, -COOL -COX, or, -CTN(R")CH2COOL; L is hydrogen alkali metal, or, saturated hydrocarbyl; X is halo; T is oxygen or sulfur; R" is an alkyl group containing 1-6 carbons; m is 0 or 1; and n is an integer of at least one.
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 July 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2008.
- 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.