US2831813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Complex ester synthetic lubricant
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-06-22
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Granted: 1958-04-22
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Expires: 1974-06-22
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Matuszak
- 👤 John K Appeldoorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:43
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/08; C10M105/32; C10M105/42; C10M105/56; C10M105/58; C10M105/60; C10M105/62; C10M2207/00; C10M2207/28; C10M2207/30; C10M2207/301; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/0425; C10N; C10N2020/00; C10N2020/01; C10N2020/011; C10N2020/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A SYNTHETIC LUBRICATING OIL HAVING OUTSTANDING LUBRICATING CHARACTERISTICS AT BOTH HIGH AND LOW TEMPERATURES WHICH COMPRISES A COMPLES ESTER OF THE FORMULA:
Claim 2
Dependent Claim
22 words
A SYNTHETIC LUBRICATING OIL HAVING OUTSTANDING LUBRICATING CHARACTERISTICS AT BOTH HIGH AND LOW TEMPERATURES WHICH COMPRISES A COMPLES ESTER OF THE FORMULA:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |