US2758975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricants
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1952-07-02
•
Granted: 1956-08-14
•
Expires: 1972-07-02
Abstract
No abstract record available.
Inventors
- 👤 Delmer L Cottle
- 👤 Jr Frederick Knoth
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:51
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/08; C10M105/32; C10M105/48; C10M169/00; C10M169/04; C10M169/041; C10M2201/00; C10M2201/06; C10M2201/063; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/125; C10M2207/129; C10M2207/24; C10M2207/28; C10M2207/32; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10N; C10N2010/00; C10N2010/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A SYNTHETIC LUBRICATING COMPOSITION WHICH COMPRISES A MAJOR PROPORTION OF A MIXTURE OF ORGANIC CARBONATES OF THE FORMULA
Claim 2
Dependent Claim
18 words
A SYNTHETIC LUBRICATING COMPOSITION WHICH COMPRISES A MAJOR PROPORTION OF A MIXTURE OF ORGANIC CARBONATES OF THE FORMULA
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |