US3266303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffused layer transducers
Assignee: AT&T Inc
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Filing: 1963-10-11
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Granted: 1966-08-16
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Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 William G Pfann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:39
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/006; G; G01; G01L; G01L1/00; G01L1/18; H10; H10D; H10D48/00; H10D48/50; H10D99/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A DIFFUSED LAYER STRAIN GAGE COMPRISING A BASE LAYER OF A SEMICONDUCTOR MATEIRAL OF A GIVEN CONDUCTIVITY TYPE AT LEAST TWO DIFFUSED LAYERS FORMED IN ESSENTIALLY OPPOSING SURFACES OF SAID BASE LAYER AND HAVING A CONDUCTIVITY TYPE WHICH IS OPPOSITE TO THAT OF THE BASE LAYER THUS FORMING P-N JUNCTIONS AND ELECTRICAL BIAS MEANS INCLUDING A GALVANOMETER AND STANDARD RESISTORS FOR CONNECTING THE SAID JUNCTIONS AS ADJACENT ARMS OF A WHEATSTONE BRIDGE.
Claim 2
Dependent Claim
72 words
A DIFFUSED LAYER STRAIN GAGE COMPRISING A BASE LAYER OF A SEMICONDUCTOR MATEIRAL OF A GIVEN CONDUCTIVITY TYPE AT LEAST TWO DIFFUSED LAYERS FORMED IN ESSENTIALLY OPPOSING SURFACES OF SAID BASE LAYER AND HAVING A CONDUCTIVITY TYPE WHICH IS OPPOSITE TO THAT OF THE BASE LAYER THUS FORMING P-N JUNCTIONS AND ELECTRICAL BIAS MEANS INCLUDING A GALVANOMETER AND STANDARD RESISTORS FOR CONNECTING THE SAID JUNCTIONS AS ADJACENT ARMS OF A WHEATSTONE BRIDGE.
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |