Patent US2620818A successfully refreshed from Google Patents.
US2620818A
Expired / Lapsed
US
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Automatic tank fill valve
Assignee: Individual
•
Filing: 1952-01-04
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Granted: 1952-12-09
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Expires: 1972-01-04
Abstract
No abstract record available.
Inventors
- 👤 Paul C Symmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:06
CPC Classifications
F; F16; F16K; F16K21/00; F16K21/04; F16K21/18; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339; Y10T137/7358; Y10T137/7368; Y10T137/7371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US226224A
Cited
US1504201A
Cited
US1915716A
Cited
US2265114A
Cited
US2418614A
Cited
US2471328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |