US2597838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant containing selenium compounds
Assignee: California Research LLC
•
Filing: 1949-07-09
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Granted: 1952-05-20
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Expires: 1969-07-09
Abstract
No abstract record available.
Inventors
- 👤 Lowe Warren
- 👤 William T Stewart
- 👤 James O Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:34
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M105/00; C10M105/72; C10M135/00; C10M135/32; C10M135/36; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/027; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2209/109; C10M2219/00; C10M2219/003; C10M2219/02; C10M2219/021; C10M2219/04; C10M2219/0406; C10M2219/044; C10M2219/046; C10M2219/0463; C10M2219/06; C10M2219/061; C10M2219/08; C10M2219/081; C10M2219/082; C10M2219/10; C10M2219/101; C10M2219/102; C10M2219/104; C10M2219/106; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/06; C10M2223/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A LUBRICANT CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A SELENIUM-CONTAINING LUBRICATING OIL COMPOSITION CORROSIVE TO SILVER, AND A SMALL AMOUNT, SUFFICIENT SUBSTANTIALLY TO INHIBIT THE FORMATION OF SILVER SELENIDE RESULTING FROM THE SELENIUM ATTACK ON SILVER, OF A 2-MERCAPTO-THIAZINE WHEREIN NOT MORE THAN FOUR OF THE RING CARBONS CONTAIN ALIPHATIC GROUPS EACH OF WHICH HAS NOT MORE THAN 4 CARBON ATOMS.
Claim 2
Dependent Claim
62 words
A LUBRICANT CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A SELENIUM-CONTAINING LUBRICATING OIL COMPOSITION CORROSIVE TO SILVER, AND A SMALL AMOUNT, SUFFICIENT SUBSTANTIALLY TO INHIBIT THE FORMATION OF SILVER SELENIDE RESULTING FROM THE SELENIUM ATTACK ON SILVER, OF A 2-MERCAPTO-THIAZINE WHEREIN NOT MORE THAN FOUR OF THE RING CARBONS CONTAIN ALIPHATIC GROUPS EACH OF WHICH HAS NOT MORE THAN 4 CARBON ATOMS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |