Patent US2561922A successfully refreshed from Google Patents.
US2561922A
Expired / Lapsed
US
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Valve for liquid systems
Assignee: Ex-Cell-O Corp
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Filing: 1945-12-22
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Granted: 1951-07-24
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Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 Hall John Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:41
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/0651; G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87829
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US193087A
Cited
US483108A
Cited
US571833A
Cited
US1085425A
Cited
GB208703A
Cited
AT151789B
Cited
US2405127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |