US2592474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twin plunger valve
Assignee: Von Roll AG
•
Filing: 1945-11-16
•
Granted: 1952-04-08
•
Expires: 1965-11-16
Abstract
No abstract record available.
Inventors
- 👤 Schnyder Ottmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:24
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/12; F16K1/126; Y; Y10; Y10T; Y10T137/00; Y10T137/3367; Y10T137/8593; Y10T137/87096; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US881412A
Cited
US1290722A
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US1517504A
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US1519136A
Cited
US1540279A
Cited
US1555075A
Cited
US1727517A
Cited
US2088261A
Cited
US2085893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |