US2552510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant containing ethers with multiple sulfur or like linkages
Assignee: Elgin National Watch Co
•
Filing: 1944-09-05
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Granted: 1951-05-15
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Expires: 1964-09-05
Abstract
No abstract record available.
Inventors
- 👤 George E Barker
- 👤 Jr George E Alter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:53
CPC Classifications
C; C10; C10M; C10M3/00; C10M2205/00; C10M2205/04; C10M2207/00; C10M2207/02; C10M2207/023; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2040/00; C10N2040/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A LUBRICANT IN WHICH THE LUBRICATING BASE IS DIAMYL-DITHIO-DIALKYL SULFIDES AS A MIXTURE OF ISOMERS, THE SAID ALKYL GROUPS HAVING A CHAIN OF 2 TO 7 CARBON ATOMS, SAID LUBRICANT BEING CHARACTERIZED IN HAVING A VISCOSITY AT 100* F. OF SUBSTANTIALLY 6.5 TO 12.8 CENTISTOKES, A VISCOSITY AT 32* F. OF SUBSTANTIALLY 23.3 TO 46.3 CENTISTOKES, AND CLOUD AND POUR POINTS BELOW MINUS 100* F.
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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |