Lubricant compositions for autotraction
CA 2053691 C · Owner: Gerbaz, Giampaolo · Inventors: Gerbaz, Giampaolo; Fisicaro, Giuseppe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lubricant composition comprises: a) a mineral base oil; b) a synthetic base oil; c) a dialkyl carbonate; d) conventional additives; and e) viscosity index and pour point improvers. Component c) is the product of transesterification of a dialkyl carbonate with an alcoholic mixture consisting of at least 98% by weight of branched alcohols having the general formula, (see formula I), where m is an integer and n is zero or a whole number with, the condition that the total number of carbon atoms in the molecule (I) is between 10 and 18.
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
- Filed October 18, 1991 and granted September 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2013.
- 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.