Dye mixtures
CA 1302014 C · Owner: Senninger, Rudolf · Inventors: Derber, Bernd; Senninger, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
8 - O.Z. 0050/38603, Abstract of the Disclosure: Dye mixtures contain an oilsoluble dye and a dye of the formula, where D is phenyl which is unsubstituted or substituted by methyl or methoxy, R is hydrogen or methyl R1 is hy-, drogen or C1-C4-alkyl and R2 is C3- or C4-alkyl. The mixtures according to the invention are preferably used for coloring and marking mineral oil products.
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 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 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.