US2535310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Individual
•
Filing: 1945-08-14
•
Granted: 1950-12-26
•
Expires: 1965-08-14
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Mattison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US192584A
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US226588A
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US729423A
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US1033959A
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US1561646A
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US1604252A
Cited
US1761721A
Cited
FR621883A
Cited
US2113147A
Cited
US2116833A
Cited
US2167952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |