US3738162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fatigue damage indicator
Assignee: United States Department of the Army
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Filing: 1971-09-10
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Granted: 1973-06-12
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Expires: 1991-09-10
Abstract
Abstract In a fatigue damage indicator system comprising a work piece structure, carrier and sensing means operably connected to indicator means; the improvement wherein the sensing means are composed of a conductive material dispersed in a matrix of an insulating material.
Inventors
- 👤 J Dally
- 👤 G Panizza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:02
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/02; G01N3/06; G01N3/066; G01N2203/00; G01N2203/02; G01N2203/06; G01N2203/0617; G01N2203/0629
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |