US2725345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized mineral oils and method of preparation
Assignee: North Atlantic Energies SA
•
Filing: 1952-02-19
•
Granted: 1955-11-29
•
Expires: 1972-02-19
Abstract
No abstract record available.
Inventors
- 👤 Binovic Kurt
- 👤 Dupas Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:37
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/02; C10M159/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
AN OIL COMPOSITION OF HIGH OXIDATION RESISTANCE COMPRISING A MINERAL BASE OIL FRACTION OF INSULATING-LUBRICATING OIL VISCOSITY GRADE CONTAINING 0.01 UP TO 1% BY VOLUME OF A PROPANE DEASPHALTED RESIDUAL OIL FROM THE DISTILLATION OF CRUDE PETROLEUM.
Claim 2
Dependent Claim
37 words
AN OIL COMPOSITION OF HIGH OXIDATION RESISTANCE COMPRISING A MINERAL BASE OIL FRACTION OF INSULATING-LUBRICATING OIL VISCOSITY GRADE CONTAINING 0.01 UP TO 1% BY VOLUME OF A PROPANE DEASPHALTED RESIDUAL OIL FROM THE DISTILLATION OF CRUDE PETROLEUM.
References Cited (Backward Citations)
US1833374A
Cited
US2200534A
Cited
US2165432A
Cited
US2117602A
Cited
US2139668A
Cited
US2195659A
Cited
US2295035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |