Patent DE450462C successfully refreshed from Google Patents.
US2880756A
Expired / Lapsed
US
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Rotary slide valve device
Assignee: Individual
•
Filing: 1954-09-15
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Granted: 1959-04-07
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Expires: 1974-09-15
Abstract
No abstract record available.
Inventors
- 👤 Puls Erich Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/08; F16K11/085; F16K11/0856; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86646; Y10T137/86654; Y10T137/86662
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1763154A
Cited
US2182459A
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US2115950A
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US2301348A
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US2313257A
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US2607207A
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US2749941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |