US2930575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valve and seat construction
Assignee: Hydromatics Inc
•
Filing: 1957-08-26
•
Granted: 1960-03-29
•
Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Britton Harrison John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:11
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0626; F16K5/0642
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB166481A
Cited
US1584600A
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US1616386A
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US1670691A
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US1770900A
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US2475702A
Cited
US2751185A
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US2698731A
Cited
US2695628A
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US2610300A
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US2800295A
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DE883374C
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FR1072917A
Cited
US2839074A
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 |