US3196668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual semiconductor strain gauges
Assignee: Electro Optical Systems Inc
•
Filing: 1962-03-26
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Granted: 1965-07-27
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 William H Mclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:59
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
92 words
A SEMICONDUCTOR STRAIN GAUGE COMPRISING, IN COMBINATION: (A) AN ELONGATE UNITARY SEMICONDUCTOR CRYSTAL BODY OF A PREDETERMINED CRYSTALLOGRAPHIC ORIENTATION, SAID CRYSTAL BODY DEFINING A FIRST REGION OF ONE PREDETERMINED CONDUCTIVITY TYPE, AND A SECOND REGION OF OPPOSITIVE CONDUCTIVITY TYPE, SAID FIRST REGION AND SECOND REGION BEING ELECTRICALLY ISOLATED, SAID FIRST REGION DEFINING A FIRST SEMICONDUCTOR STRAIN GAUGE ELEMENT HAVING A FIRST GAUGE FACTOR AND SAID SECOND REGION DEFINING A SECOND SEMI CONDUCTOR STRAIN GAUGE ELEMENT HAVING AN OPPOSITE POLARITY GAUGE FACTOR; AND, (B) MEANS ELECTRICALLY INTERCONNECTING SAID FIRST AND SECOND GAUGE ELEMENTS.
Claim 2
Dependent Claim
92 words
A SEMICONDUCTOR STRAIN GAUGE COMPRISING, IN COMBINATION: (A) AN ELONGATE UNITARY SEMICONDUCTOR CRYSTAL BODY OF A PREDETERMINED CRYSTALLOGRAPHIC ORIENTATION, SAID CRYSTAL BODY DEFINING A FIRST REGION OF ONE PREDETERMINED CONDUCTIVITY TYPE, AND A SECOND REGION OF OPPOSITIVE CONDUCTIVITY TYPE, SAID FIRST REGION AND SECOND REGION BEING ELECTRICALLY ISOLATED, SAID FIRST REGION DEFINING A FIRST SEMICONDUCTOR STRAIN GAUGE ELEMENT HAVING A FIRST GAUGE FACTOR AND SAID SECOND REGION DEFINING A SECOND SEMI CONDUCTOR STRAIN GAUGE ELEMENT HAVING AN OPPOSITE POLARITY GAUGE FACTOR; AND, (B) MEANS ELECTRICALLY INTERCONNECTING SAID FIRST AND SECOND GAUGE ELEMENTS.
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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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |