US2772409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive flow indicator
Assignee: SMITHS JACKING SYSTEMS Ltd
•
Filing: 1953-01-21
•
Granted: 1956-11-27
•
Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Reid Kenneth Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:07
CPC Classifications
F; F15; F15B; F15B21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1306154A
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US2468768A
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US2332301A
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US2348651A
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US2392581A
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US2497375A
Cited
US2629089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |