Patent US3150341A successfully refreshed from Google Patents.
US3150341A
Expired / Lapsed
US
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Piezoresistive stress transducers
Assignee: AT&T Inc
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Filing: 1961-04-25
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Granted: 1964-09-22
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Expires: 1981-04-25
Abstract
No abstract record available.
Inventors
- 👤 William G Pfann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/18; G01B; G01B7/00; G01B7/16; H; H10; H10D; H10D48/00; H10D48/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PIEZORESISTIVE, SEMICONDUCTOR STRESS GAGE, COMPRISING IN COMBINATION, A TEST BODY IN WHICH STRAINS ARE DESIRED TO BE MEASURED, A FLAT SINGLE CRYSTAL, PIEZORESISTIVE, SEMICONDUCTOR WAFER HAVING A CUBIC CRYSTAL STRUCTURE, SAID WAFER AFFIXED TO THE SURFCE OF SAID TEST BODY WITH ITS PLANAR DIMENSION PARALLET TO THE SURFACE OF THE TEST BODY, MEANS INCLUDING ELECTRICAL CONTACTS FOR MEASURING ELECTRICAL RESISTANCE VARIATIONS THROUGH THE THICKNESS OF SAID WAFER AND IN A <111> CRYSTALLOGRAPHIC DIRECTION.
Claim 2
Dependent Claim
74 words
A PIEZORESISTIVE, SEMICONDUCTOR STRESS GAGE, COMPRISING IN COMBINATION, A TEST BODY IN WHICH STRAINS ARE DESIRED TO BE MEASURED, A FLAT SINGLE CRYSTAL, PIEZORESISTIVE, SEMICONDUCTOR WAFER HAVING A CUBIC CRYSTAL STRUCTURE, SAID WAFER AFFIXED TO THE SURFCE OF SAID TEST BODY WITH ITS PLANAR DIMENSION PARALLET TO THE SURFACE OF THE TEST BODY, MEANS INCLUDING ELECTRICAL CONTACTS FOR MEASURING ELECTRICAL RESISTANCE VARIATIONS THROUGH THE THICKNESS OF SAID WAFER AND IN A <111> CRYSTALLOGRAPHIC DIRECTION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |