US2741987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety means for electrically operated pumps
Assignee: Individual
•
Filing: 1953-02-10
•
Granted: 1956-04-17
•
Expires: 1973-02-10
Abstract
No abstract record available.
Inventors
- 👤 Frank W Murphy
- 👤 Arthur C Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/02; F04D15/0209; H; H01; H01H; H01H35/00; H01H35/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US821747A
Cited
US1253687A
Cited
US1589545A
Cited
US1570784A
Cited
US1826089A
Cited
US2211052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |