Polycyclic thiophen lubricating oil additive and method of reducing coking tendencies of lubricating oils
CA 1280401 C · Owner: Dickakian, Ghazi Basher · Inventors: Dickakian, Ghazi Basher; Bloch, Ricardo Alfredo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inexpensive lubricating oil antioxidants having a solubilizing group which comprises alkyl and cycloalkylsubstituted aromatics and a reducing thiophenyl group which, are useful motor oil additives. Method of reducing coking tendencies of lubricating oils by incorporating the substituted aromatic antioxidants.
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 February 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 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.