US2691773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve leak detector
Assignee: Individual
•
Filing: 1951-07-23
•
Granted: 1954-10-12
•
Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Harold V Lichtenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:02
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10; F16K37/00; Y; Y10; Y10T; Y10T137/00; Y10T137/5762; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8292; Y10T137/8326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1032971A
Cited
US1844553A
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US2134072A
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US2230961A
Cited
US2416570A
Cited
US2382235A
Cited
US2495081A
Cited
US2501800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |