US2794780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic zinc dialkyl dithiophosphates and methods of making the same
Assignee: Wyeth Holdings LLC
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Filing: 1954-03-25
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Granted: 1957-06-04
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Expires: 1974-03-25
Abstract
No abstract record available.
Inventors
- 👤 Vernon P Wystrach
- 👤 Edwin O Hook
- 👤 George L Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25; C10N2040/252; C10N2040/253
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A HYDROCARBON MINERAL LUBRICATING OIL COMPOSITION COMPRISING A RELATIVELY LARGE PROPORTION OF A HYDROCARBON MINERAL LUBRICATING OIL HAVING DISSOLVED THEREIN A RELATIVELY SMALL AMOUNT FROM ABOUT 0.1% TO ABOUT 5% BY WEIGHT, SUFFICIENT TO INHIBIT DETERIORATION OF THE OIL BY OXIDATION, OF A BASIC ZINC DITHIOPHOSPHATE HAVING THE FORMULA
References Cited (Backward Citations)
US2364283A
Cited
US2535024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |