US3523771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual detection of gas leaks
Assignee: AMERICAN DYNAMICS INT
•
Filing: 1967-09-21
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Granted: 1970-08-11
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Expires: 1987-09-21
Abstract
No abstract record available.
Inventors
- 👤 Amos R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:42
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/12; F; F16; F16L; F16L2101/00; F16L2101/30
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) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |