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US2706612A
Expired / Lapsed
US
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Multi-chamber non-vibrating flexible sleeve valve
Assignee: Individual
•
Filing: 1950-10-17
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Granted: 1955-04-19
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Expires: 1970-10-17
Abstract
No abstract record available.
Inventors
- 👤 Johannes B Ratelband
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:29
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/07; F16K7/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1731571A
Cited
US1914600A
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US2247363A
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US2467150A
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US2573712A
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US2518625A
Cited
US2577613A
Cited
US2590215A
Cited
US2576810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |