US2071969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination stop and check valve
Assignee: M L R DIESCHER
•
Filing: 1934-05-28
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Granted: 1937-02-23
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Expires: 1954-05-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Diescher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:47
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/26; Y; Y10; Y10T; Y10T137/00; Y10T137/3367; Y10T137/3421; Y10T137/7722; Y10T137/7723; Y10T137/7729; Y10T137/7771; Y10T137/7781; Y10T137/7784; Y10T137/7785; Y10T137/8593; Y10T137/86493; Y10T137/87265; Y10T137/87555
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-02-23 | 1940-08-24 | 1941-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-23 | 1944-08-24 | 1945-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-23 | 1948-08-24 | 1949-02-23 | $7700.00 | Window Closed / Lapsed |