US2760093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric generator
Assignee: National Pneumatic Co Inc
•
Filing: 1953-05-07
•
Granted: 1956-08-21
•
Expires: 1973-05-07
Abstract
No abstract record available.
Inventors
- 👤 Charles T Button
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:29
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/14; H02K21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190606838A
Cited
US1238534A
Cited
US1477271A
Cited
GB272472A
Cited
US2103165A
Cited
US2516380A
Cited
US2651734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |