Patent US1816205A successfully refreshed from Google Patents.
US1816205A
Expired / Lapsed
US
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Valve and seat therefor
Assignee: Individual
•
Filing: 1925-05-11
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Granted: 1931-07-28
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Expires: 1945-05-11
Abstract
No abstract record available.
Inventors
- 👤 Biedermann Paul Robert George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; Y; Y10; Y10S; Y10S137/00; Y10S137/902; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7919
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) | 1934-07-27 | 1935-01-26 | 1935-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-27 | 1939-01-26 | 1939-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-27 | 1943-01-26 | 1943-07-28 | $7700.00 | Window Closed / Lapsed |