Patent US2838269A successfully refreshed from Google Patents.
US2838269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm valve with self purging bleed port
Assignee: Individual
•
Filing: 1953-08-21
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Granted: 1958-06-10
•
Expires: 1973-08-21
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Hunter
- 👤 Lorenzo A Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:35
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16K7/14; F16K7/17; F16K29/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US171514A
Cited
US509401A
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US848739A
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US1046236A
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US1165913A
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US1501331A
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US1540214A
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US1808989A
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DE492672C
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US1877780A
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US1851062A
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US2208122A
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US2648351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |