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US2989037A
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US
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Automatic gravity feed water system and control
Assignee: Individual
•
Filing: 1959-06-30
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Granted: 1961-06-20
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Expires: 1979-06-30
Abstract
No abstract record available.
Inventors
- 👤 Filippino Samuel Robert
- 👤 David C Rabinowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:09
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; F; F22; F22B; F22B37/00; F22B37/02; F22B37/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1405783A
Cited
US1531993A
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US2602644A
Cited
US2723755A
Cited
US2851016A
Cited
GB801759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |