US2747775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring valve closure
Assignee: TANRA Manufacturing CO
•
Filing: 1953-04-29
•
Granted: 1956-05-29
•
Expires: 1973-04-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Pritchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:06
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/30; F16K1/301; F16K1/303; F16K1/304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US639412A
Cited
FR352073A
Cited
US1372565A
Cited
US1614532A
Cited
US1812798A
Cited
US1972132A
Cited
US2305286A
Cited
US2502452A
Cited
US2429003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |