US3272003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fatigue life gaging methods
Assignee: Boeing Co
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Filing: 1964-01-27
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Granted: 1966-09-13
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Expires: 1984-01-27
Abstract
No abstract record available.
Inventors
- 👤 Darrell R Harting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:05
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/02; G01N3/06; G01N3/066; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2206; G01N2203/00; G01N2203/0058; G01N2203/0069; G01N2203/0073; G01N2203/02; G01N2203/022; G01N2203/0222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF MEASURING THE CUMULATIVE FATIGUE DAMAGE AT AN AREA ON A STRUCTURE WHICH IS SUBJECTED TO REPEATED LOADING COMPRISING THE STEPS OF MOUNTING A GRID OF CONDUCTIVE MATERIAL ON THE STRUCTURE TO BE TESTED SO THAT STRAINS IN THE TEST STRUCTURE ARE TRANSMITTED TO THE GRID, SUBJECTING THE STRUCTURE TO REPEATED LOADING WHICH CAUSES A PERMANENT AND FINITE CHANGE IN THE ELECTRICAL RESISTANCE OF THE GRID, MEASURING THE CHANGE IN THE RESISTANCE OF THE GRID, AND DETERMINING THE FATIGUE LIFE OF THE STRUCTURE BY COMPARING THE CHANGE IN RESISTANCE WITH FATIGUE LIFE DATA ON THE GRID MATERIAL OBTAINED UNDER KNOWN CONDITIONS.
Claim 2
Independent Claim
103 words
THE METHOD OF MEASURING THE CUMULATIVE FATIGUE DAMAGE AT AN AREA ON A STRUCTURE WHICH IS SUBJECTED TO REPEATED LOADING COMPRISING THE STEPS OF MOUNTING A GRID OF CONDUCTIVE MATERIAL ON THE STRUCTURE TO BE TESTED SO THAT STRAINS IN THE TEST STRUCTURE ARE TRANSMITTED TO THE GRID, SUBJECTING THE STRUCTURE TO REPEATED LOADING WHICH CAUSES A PERMANENT AND FINITE CHANGE IN THE ELECTRICAL RESISTANCE OF THE GRID, MEASURING THE CHANGE IN THE RESISTANCE OF THE GRID, AND DETERMINING THE FATIGUE LIFE OF THE STRUCTURE BY COMPARING THE CHANGE IN RESISTANCE WITH FATIGUE LIFE DATA ON THE GRID MATERIAL OBTAINED UNDER KNOWN CONDITIONS.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |