US2500454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating system
Assignee: US Electrical Motors Inc
•
Filing: 1943-05-17
•
Granted: 1950-03-14
•
Expires: 1963-05-17
Abstract
No abstract record available.
Inventors
- 👤 William M Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:42
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/66; F16C33/6637; F16C33/6659; F16C33/6666; F16C33/664; F16C33/6651; F16N; F16N7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1607222A
Cited
US1865088A
Cited
GB284453A
Cited
GB321997A
Cited
US1992818A
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US2000581A
Cited
US2179321A
Cited
US2255662A
Cited
US2242262A
Cited
US2266107A
Cited
US2239283A
Cited
US2325283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |