US2689220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions of mixed diester dithiophosphates
Assignee: California Research LLC
•
Filing: 1951-03-29
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Granted: 1954-09-14
•
Expires: 1971-03-29
Abstract
No abstract record available.
Inventors
- 👤 Paul K Mulvany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:58
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/17; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/027; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2209/109; C10M2211/00; C10M2211/08; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/065; C10M2223/12; C10M2223/121; C10M2227/00; C10M2227/02; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A LUBRICANT CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND FROM 0.05% TO 2.0% OF ZINC SALTS OF MIXED ESTERS OF DITHIOPHOSPHORIC ACIDS PRODUCED BY REACTING PHOSPHORUS PENTASULFIDE WITH A BLEND OF 2 ALIPHATIC MONOHYDRIC ALCOHOLS AT TEMPERATURES FROM 120* F. TO 200* F., ONE OF SAID ALCOHOLS CONTAINING NOT MORE THAN 4 CARBON ATOMS, THE OTHER OF SAID ALCOHOLS CONTAINING FROM 6 TO 18 CARBON ATOMS, THE RATIO OF THE LOWER MOELCULAR WEIGHT ALCOHOL TO THE HIGHER MOLECULAR WEIGHT ALCOHOL BEING FROM 1.0 TO 5.0.
Claim 2
Dependent Claim
91 words
A LUBRICANT CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND FROM 0.05% TO 2.0% OF ZINC SALTS OF MIXED ESTERS OF DITHIOPHOSPHORIC ACIDS PRODUCED BY REACTING PHOSPHORUS PENTASULFIDE WITH A BLEND OF 2 ALIPHATIC MONOHYDRIC ALCOHOLS AT TEMPERATURES FROM 120* F. TO 200* F., ONE OF SAID ALCOHOLS CONTAINING NOT MORE THAN 4 CARBON ATOMS, THE OTHER OF SAID ALCOHOLS CONTAINING FROM 6 TO 18 CARBON ATOMS, THE RATIO OF THE LOWER MOELCULAR WEIGHT ALCOHOL TO THE HIGHER MOLECULAR WEIGHT ALCOHOL BEING FROM 1.0 TO 5.0.
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) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |