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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11674103 B1

PDFFull Text
Date of Patent:
Jun. 13, 2023

Filed:

Jan. 22, 2020

Lubricant base stock

Applicant:

Croda International Plc, Goole, GB;

Inventors:

Kevin John Duncan, Goole, GB;

Paul Bonner, Goole, GB;

Assignee:

EQUUS UK TOPCO LTD, Goole, GB;

Attorney:
Primary Examiner:

Ellen M McAvoy

Int. Cl.
CPC ...
C10M 107/34 (2006.01); C10N 30/00 (2006.01); C10N 20/00 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01); C10N 30/02 (2006.01); C10N 30/06 (2006.01); C10N 30/10 (2006.01); C10N 30/12 (2006.01); C10N 40/04 (2006.01); C10N 40/08 (2006.01);
U.S. Cl.
CPC ...
C10M 107/34 (2013.01); C10M 2209/1045 (2013.01); C10M 2209/1055 (2013.01); C10N 2020/017 (2020.05); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2020/081 (2020.05); C10N 2030/02 (2013.01); C10N 2030/06 (2013.01); C10N 2030/10 (2013.01); C10N 2030/12 (2013.01); C10N 2030/40 (2020.05); C10N 2030/64 (2020.05); C10N 2040/04 (2013.01); C10N 2040/08 (2013.01);
Abstract

The present invention relates to a lubricant base stock, lubricant formulations, a method of lubricating a rotating shaft within a stern tube and the use of a lubricant base stock. The base stock and lubricant formulations may be particularly suited for use in aqueous environments (including fresh water or salt water). A lubricant base stock comprising a first (EO)(PO)(EO) block co-polymer and a second (EO)(PO)(EO) block co-polymer which is different from the first (EO)(PO)(EO) block co-polymer in a marine lubricant formulation wherein the lubricant base stock has a density of at least 1028 kg/mat 20° C. and at most 1022 kg/mat 40° C. in particular is provided.

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