Patent US2833301A successfully refreshed from Google Patents.
US2833301A
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Valve device
Assignee: WALTER RATNER
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Filing: 1956-01-18
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Granted: 1958-05-06
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Expires: 1976-01-18
Abstract
No abstract record available.
Inventors
- 👤 Argus William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:36
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/44; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6184; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/8593; Y10T137/87917; Y10T137/87981; Y10T137/87997; Y10T137/88005; Y10T137/88054; Y10T137/88062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |