Patent US3745544A successfully refreshed from Google Patents.
US1576331A
Expired / Lapsed
US
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Automatic valve
Assignee: Individual
•
Filing: 1925-06-30
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Granted: 1926-03-09
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Expires: 1945-06-30
Abstract
No abstract record available.
Inventors
- 👤 Edward G Kelley
- 👤 Zirkle Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:23
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/302; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/3115; Y10T137/3127; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7886
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-03-08 | 1929-09-07 | 1930-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-03-08 | 1933-09-07 | 1934-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-03-08 | 1937-09-07 | 1938-03-09 | $7700.00 | Window Closed / Lapsed |