Hydraulic fluids
CA 1106354 A · Owner: Teves Alfred G.M.B.H. · Inventors: Von Werner, Konrad; Knoblauch, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure: Hydraulic fluids the primary properties of which comply with the official specifications and moreover, which have, a good lubricating effect a high oxidation stability and a, high acid stability consist of about 10 to 60 % by weight of a nitrogen-containing boric acid ester about 5 to 30 % by, weight of an alkyl-polyethylene glycol tert. butyl ether and about 35 to 75 % by weight of a glycol monoalkyl ether. The nitrogen-containing boric acid ester is a reaction product of an alkoxylated monoalkyl amine, orthoboric acid and optionally a glycol.
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 August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 1998.
- 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.