Lubricating grease composition
CA 2033074 C · Owner: Sohn, Dieter · Inventors: Sohn, Dieter; Seubert, Edwin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
14, Abstract, A lubricating grease compound formed of a basic oil and a lower proportion of a thickening agent derived from a polyurea (polycarbamide) compound as well as the usual additives in which the base oil is an ester, of an aromatic ditri-, or tetra-carboxylic acid with one or more C7-C18alkanols and the thickening agent is the reaction product of a compound of the general formula, A(B)n (I), with an amine of the general formula H2N-R (II) wherein, A = CH4-n, B = aromatic mono- or di-isocyanate residue n = 1 - 3, and, R = an alkyl or an alkenyl residue with 8 to 22-C-atoms or an aryl residue with 6 to 10-C-atoms, and in which the mixture of the basic oil and the thickening agent has …
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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 May 30, 1990 and granted February 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2012.
- 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.