US2615676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excess flow check valve
Assignee: Columbia Southern Chemical Corp
•
Filing: 1948-09-25
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Granted: 1952-10-28
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Expires: 1968-09-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Neubauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28; F16K17/285; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6086; Y10T137/6109; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/7873; Y10T137/8593; Y10T137/86292; Y10T137/863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US387961A
Cited
US1388602A
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GB190904191A
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US1279599A
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US1292988A
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US1490848A
Cited
US1820138A
Cited
US1882314A
Cited
FR804620A
Cited
FR905730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |