US2820014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester lubricants
Assignee: Shell Development Co
•
Filing: 1955-05-02
•
Granted: 1958-01-14
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Hartley James
- 👤 Ramsay Thomas Henry
- 👤 Shimmin James Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:11
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/025; C10M2207/027; C10M2207/028; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/14; C10M2207/141; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/16; C10M2207/26; C10M2207/262; C10M2207/28; C10M2207/283; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/084; C10M2209/10; C10M2209/101; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/109; C10M2211/00; C10M2211/04; C10M2211/042; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/087; C10M2219/088; C10M2219/089; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/06; C10M2223/063; C10M2223/065; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF LIQUID ESTERS, ONE OF WHICH IS A DIGESTER OF A BRANCHED CHAIN ALKANE PRIMARY DIOL HAVING FROM 4 TO 18 CARBON ATOMS PER MOLECULE WITH A STRAIGHT CHAIN SATURATED FATTY ACID HAVING FROM 4 TO 18 CARBON ATOMS PER MOLECULE, AND THE OTHER OF WHICH IS A DIESTER OF A STRAIGHT CHAIN ALKANE DI-PRIMARY DIOL HAVING FROM 3 TO 12 CARBON ATOMS PER MOLECULE WITH A BRANCHED CHAIN SATURATED FATTY ACID HAVING FROM 4 TO 18 CARBON ATOMS PER MOLECULE, THE MOL RATIO OF THE FIRST DIESTER TO THE SECOND DIESTER BEING BETWEEN 65:35 2:98.
Claim 2
Dependent Claim
104 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF LIQUID ESTERS, ONE OF WHICH IS A DIGESTER OF A BRANCHED CHAIN ALKANE PRIMARY DIOL HAVING FROM 4 TO 18 CARBON ATOMS PER MOLECULE WITH A STRAIGHT CHAIN SATURATED FATTY ACID HAVING FROM 4 TO 18 CARBON ATOMS PER MOLECULE, AND THE OTHER OF WHICH IS A DIESTER OF A STRAIGHT CHAIN ALKANE DI-PRIMARY DIOL HAVING FROM 3 TO 12 CARBON ATOMS PER MOLECULE WITH A BRANCHED CHAIN SATURATED FATTY ACID HAVING FROM 4 TO 18 CARBON ATOMS PER MOLECULE, THE MOL RATIO OF THE FIRST DIESTER TO THE SECOND DIESTER BEING BETWEEN 65:35 2:98.
References Cited (Backward Citations)
US2603604A
Cited
US2691663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |