US2838573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of complex formal synthetic lubricants by a formal interchange
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-03-31
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Granted: 1958-06-10
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Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Matuszak
- 👤 Harold R Ready
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:03
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/04; C10M2207/046; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/108; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
IN A PROCESS FOR THE PREPARATION OF COMPLEX FORMAL LUBRICATING COMPOSITIONS HAVING AN ASTM POUR POINT BELOW ABOUT +20*F., A VISCOSITY AT 210F. OF BETWEEN 30 AND 110 S. U. S. AND A FLASH POINT ABOVE ABOUT 350*F., BY REACTING A FORMAL OF THE FORMULA
Claim 2
Dependent Claim
45 words
IN A PROCESS FOR THE PREPARATION OF COMPLEX FORMAL LUBRICATING COMPOSITIONS HAVING AN ASTM POUR POINT BELOW ABOUT +20*F., A VISCOSITY AT 210F. OF BETWEEN 30 AND 110 S. U. S. AND A FLASH POINT ABOVE ABOUT 350*F., BY REACTING A FORMAL OF THE FORMULA
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |