US3472629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen leak detection device
Assignee: National Aeronautics and Space Administration
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Filing: 1967-05-08
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Granted: 1969-10-14
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Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 Marjorie A Rommel
- 👤 Victor H Dayan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; F; F17; F17C; F17C13/00; F17C13/12; G01M3/002; G01M3/20; G01N; G01N25/00; G01N25/20; G01N25/22; G01N25/40; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S252/00; Y10S252/964; Y10T; Y10T436/00; Y10T436/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |