US3295085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor strain transducer device
Assignee: Raytheon Co
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Filing: 1963-09-03
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Granted: 1966-12-27
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Roger F Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:08
CPC Classifications
H; H04; H04R; H04R21/00; H04R21/04; G; G01; G01L; G01L1/00; G01L1/18; H04R23/00; H10; H10D; H10D48/00; H10D48/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
148 words
A DEVICE SENSITIVE TO VARIATIONS IN STRESS INCLUDING A BODY OF SEMICONDUCTOR MATERIAL HAVING TWO REGIONS OF OPPOSITE CONDUCTIVITY, ONE OF SAID REGIONS HAVING A BROAD SURFACE, A RECTIFYING JUNCTION BETWEEN SAID REGIONS AND DISPOSED AT A DEPTH OF LESS THAN 0.010 INCHES FROM SAID BROAD SURFACE AND DISPOSED IN A PLANE PARALLEL THERETO, MEANS FOR PRODUCING A STRESS IN SAID JUNCTION, SAID MEANS FOR PRODUCING A STRAIN COMPRISING AN ELONGATED MEMBER BEARING ON SAID BROAD SURFACE WITH A POINTED TIP HAVING A RADIUS OF CURVATURE OF LESS THAN ABOUT 250 MICRONS, AND A DEFORMABLE MATERIAL ENCLOSING SAID MEMBER AND BOARD SURFACE AND SUSPENDING SAID MEMBER IN CONTACT WITH SAID SURFACE, SAID DEFORMABLE MATERIAL BEING PLIABLE FOR PERMITTING LONGIDUINAL MOVEMENT OF SAID MEMBER TO CAUSE VARIATIONS IN PRESSURE UPON SAID SURFACE BY SAID MEMBER AND RESULTANT STRESSING OF A SMALL AREA OF THE JUNCTION UNDERLYING SAID BROAD SURFACE.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |