Patent US2930574A successfully refreshed from Google Patents.
US2930574A
Expired / Lapsed
US
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Valve of throttle type
Assignee: INTERNAT YTONG STABALITE COMPA
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Filing: 1954-11-29
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Granted: 1960-03-29
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Expires: 1974-11-29
Abstract
No abstract record available.
Inventors
- 👤 Sebardt Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:37
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US859139A
Cited
US1230007A
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US1858470A
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US1977351A
Cited
US2147124A
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GB536993A
Cited
US2299865A
Cited
US2467150A
Cited
US2789795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |