US2976807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor-driven pump installation
Assignee: Perfect Circle Corp
•
Filing: 1956-10-02
•
Granted: 1961-03-28
•
Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 Robert H Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:18
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US652168A
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US2094811A
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US2690713A
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US2634390A
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US2778313A
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US2661697A
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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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |