US2780177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatically operated diaphragm pump
Assignee: Individual
•
Filing: 1952-09-29
•
Granted: 1957-02-05
•
Expires: 1972-09-29
Abstract
No abstract record available.
Inventors
- 👤 Walter J Hoenecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:08
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F01L25/063; F04B43/00; F04B43/02; F04B43/06; F04B43/073; F04B43/0733; F04B7/00; F04B7/02; F04B7/0266; F04B7/0275; F04B9/00; F04B9/08; F04B9/12; F04B9/123; F04B9/1235
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US491116A
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US514608A
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US1834957A
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DE697303C
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US2383193A
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US2391605A
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US2598207A
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US2625886A
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US2702006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |