US2586691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excess flow check valve
Assignee: Bastian Blessing Co
•
Filing: 1947-06-26
•
Granted: 1952-02-19
•
Expires: 1967-06-26
Abstract
No abstract record available.
Inventors
- 👤 Ellsworth L Mills
- 👤 Raymond R Zimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:35
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7782; Y10T137/7784; Y10T137/7785; Y10T137/7792
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US657707A
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US727484A
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US1123123A
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US1039520A
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US1142219A
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FR490008A
Cited
US1492980A
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US1545821A
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US1919955A
Cited
FR778928A
Cited
US2307949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |