Patent US2533989A successfully refreshed from Google Patents.
US2533989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antioxidants for greases and similar materials
Assignee: Standard Oil Development Co
•
Filing: 1947-08-30
•
Granted: 1950-12-12
•
Expires: 1967-08-30
Abstract
No abstract record available.
Inventors
- 👤 Beerbower Alan
- 👤 John C Zimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:00
CPC Classifications
C; C10; C10M; C10M5/00; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A LUBRICATING GREASE COMPOSITION CONSISTING ESSENTIALLY OF MINERAL OIL AND SOAP TO WHICH IS ADDED 0.5 TO 3% OF PHENYL-ALPHA-NAPHTHYLAMINE, AND 0.5 TO 3% OF A RESINOUS COMPOSITION HAVING THE GENERAL COMPOSITIONAL FORMULA:
Claim 2
Dependent Claim
33 words
A LUBRICATING GREASE COMPOSITION CONSISTING ESSENTIALLY OF MINERAL OIL AND SOAP TO WHICH IS ADDED 0.5 TO 3% OF PHENYL-ALPHA-NAPHTHYLAMINE, AND 0.5 TO 3% OF A RESINOUS COMPOSITION HAVING THE GENERAL COMPOSITIONAL FORMULA:
References Cited (Backward Citations)
US2255597A
Cited
US2348638A
Cited
US2332825A
Cited
US2364502A
Cited
US2369705A
Cited
US2360631A
Cited
US2401957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |