US2664261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silent valve
Assignee: Individual
•
Filing: 1947-01-03
•
Granted: 1953-12-29
•
Expires: 1967-01-03
Abstract
No abstract record available.
Inventors
- 👤 Albert R Stephany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:44
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/02; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7475
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1031932A
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US1520694A
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US1638436A
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US1609340A
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US1618349A
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US1637592A
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US1838429A
Cited
US1863712A
Cited
US1968779A
Cited
US2283945A
Cited
US2164927A
Cited
US2329337A
Cited
US2395906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |