US1822682A
Expired / Lapsed
US
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Valve seat
Assignee: Duracell Inc USA
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Filing: 1928-06-12
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Granted: 1931-09-08
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Expires: 1948-06-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Weiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:38
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/42; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12174; Y10T428/12229; Y10T428/12236; Y10T428/1225
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) | 1934-09-07 | 1935-03-09 | 1935-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-09-07 | 1939-03-09 | 1939-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-09-07 | 1943-03-09 | 1943-09-08 | $7700.00 | Window Closed / Lapsed |