US2798173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible electric motors
Assignee: James Beresford and Son Ltd
•
Filing: 1954-02-09
•
Granted: 1957-07-02
•
Expires: 1974-02-09
Abstract
No abstract record available.
Inventors
- 👤 Penlington Thomas Edward
- 👤 Cooksley Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/1285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1396521A
Cited
US1543502A
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US1678380A
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DE461342C
Cited
US2310422A
Cited
US2401386A
Cited
US2385385A
Cited
DE838921C
Cited
US2428816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |