US2445936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterproofing of lubricating greases
Assignee: Shell Development Co
•
Filing: 1945-04-27
•
Granted: 1948-07-27
•
Expires: 1965-04-27
Abstract
No abstract record available.
Inventors
- 👤 Butcosk Richard August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:29
CPC Classifications
C; C10; C10M; C10M5/00; C10M2205/00; C10M2205/14; C10M2205/16; C10M2205/17; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/10; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/066; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |