Patent US2214844A successfully refreshed from Google Patents.
US2214844A
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US
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Automatic drain device
Assignee: Individual
•
Filing: 1939-02-10
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Granted: 1940-09-17
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Expires: 1959-02-10
Abstract
No abstract record available.
Inventors
- 👤 Herbert Van Keuren
- 👤 Archibald C Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:30
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/14; F01P11/20; Y; Y10; Y10T; Y10T137/00; Y10T137/1189; Y10T137/1353
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) | 1943-09-17 | 1944-03-18 | 1944-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-17 | 1948-03-18 | 1948-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-17 | 1952-03-18 | 1952-09-17 | $7700.00 | Window Closed / Lapsed |