US4155861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester lubricant
Assignee: Studiengesellschaft AG
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Filing: 1977-02-22
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Granted: 1979-05-22
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Expires: 1997-02-22
Abstract
Abstract Lubricant comprising in admixture a monomeric ester of a branched dicarboxyic acid and aliphatic, primary monoalcohol, and a complex ester of dicarboxylic acid and hexanediol or trimethyl hexanediol.
Inventors
- 👤 Karl Schmitt
- 👤 Josef Disteldorf
- 👤 Werner Flakus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:14
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/08; C10M105/32; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
Lubricant consisting essentially of an admixture of: (a) a monomeric diester of a lower alkyl branched dicarboxylic acid and aliphatic, primary monoalcohol, wherein the lower alkyl branched acid is selected from the group consisting of glutaric, succinic, malonic, adipic and mixtures thereof, (b) a complex ester having a molecular weight of about 500-4000 of trimethyadipic acid diester and hexanediol-1,6 or trimethyl hexanediol-1,6 in the proportion of about 1-2 moles of the dicarboxylic acid diester to 1 mole of the diol, (c) said complex ester being present in said admixture in amount of 1-81.5% thereof.
Claim 2
Dependent Claim
94 words
Lubricant consisting essentially of an admixture of: (a) a monomeric diester of a lower alkyl branched dicarboxylic acid and aliphatic, primary monoalcohol, wherein the lower alkyl branched acid is selected from the group consisting of glutaric, succinic, malonic, adipic and mixtures thereof, (b) a complex ester having a molecular weight of about 500-4000 of trimethyadipic acid diester and hexanediol-1,6 or trimethyl hexanediol-1,6 in the proportion of about 1-2 moles of the dicarboxylic acid diester to 1 mole of the diol, (c) said complex ester being present in said admixture in amount of 1-81.5% thereof.
Claim 3
Dependent Claim
14 words
Lubricant according to claim 1, said monomeric ester being an ester of trimethyladipic acid.
Claim 4
Dependent Claim
16 words
Lubricant according to claim 1, said monoalcohol of the monomeric ester being a straight chain alcohol.
Claim 5
Dependent Claim
17 words
Lubricant according to claim 3, the monoalcohol residues of monomeric ester being C 6 -C 12 .
Claim 6
Dependent Claim
29 words
Lubricant according to claim 1, wherein said complex ester is a transesterification product of about 1-2 moles of trimethyladipic acid alkyl diester and 1 mole of hexanediol-1,6 or trimethylhexanediol-1,6.
Claim 7
Dependent Claim
18 words
Lubricant according to claim 1, said monomeric ester being a diester of trimethyladipic acid and octyl and decylalcohol.
Claim 8
Dependent Claim
13 words
Lubricant according to claim 6, said molar ratio being about 1.5-1 to 1.
Claim 9
Dependent Claim
18 words
Lubricant according to claim 6, said complex ester being present in said mixture in amount of 1-10% thereof.
Claim 10
Dependent Claim
15 words
Lubricant according to claim 5, wherein said trimethyladipic acid alkyl diester is lower alkyl diester.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |