US2940313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure indicator
Assignee: Individual
•
Filing: 1956-02-27
•
Granted: 1960-06-14
•
Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Yao T Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:37
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/08; G01L23/18; F; F02; F02K; F02K9/00; F02K9/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE311436C
Cited
US2248301A
Cited
US2429248A
Cited
US2509421A
Cited
US2627749A
Cited
US2637210A
Cited
US2729730A
Cited
US2741128A
Cited
US2656444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |