Patent US1252940A successfully refreshed from Google Patents.
US1252940A
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US
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Self-acting cushion and check valve.
Assignee: RICHARDSON-PHENIX Co
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Filing: 1917-05-31
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Granted: 1918-01-08
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Expires: 1937-05-31
Abstract
No abstract record available.
Inventors
- 👤 William L Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:30
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/021; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7852; Y10T137/7866; Y10T137/7867; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7914
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) | 1921-01-07 | 1921-07-09 | 1922-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-01-07 | 1925-07-09 | 1926-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-01-07 | 1929-07-09 | 1930-01-08 | $7700.00 | Window Closed / Lapsed |