Patent US2756684A successfully refreshed from Google Patents.
US2756684A
Expired / Lapsed
US
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Rotary gear-type pump
Assignee: SIER BATH GEAR AND PUMP CO Inc
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Filing: 1954-11-12
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Granted: 1956-07-31
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Expires: 1974-11-12
Abstract
No abstract record available.
Inventors
- 👤 Peter C Renzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:57
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2082412A
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US2420622A
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US2391577A
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US2472031A
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US2540235A
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US2487732A
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US2527941A
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US2665641A
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US2682836A
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US2695566A
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US2707441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |