US3337780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance oriented semiconductor strain gage with barrier isolated element
Assignee: Bell and Howell Co
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Filing: 1964-05-21
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Granted: 1967-08-22
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Expires: 1984-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robbins Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:38
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/50; G; G01; G01L; G01L1/00; G01L1/18; H10D1/00; H10D1/40; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A STRAIN GAGE ELEMENT COMPRISING: A UNITIZED SEMICONDUCTOR BODY HAVING AT LEAST THREE REGIONS THEREON WITH TWO P-N JUNCTIONS FORMED THEREIN IN SPACED RELATION WITH EACH OTHER AND DISPOSED BETWEEN ABUTTING REGIONS, AND A PAIR OF OHMIC CONTACTS PLACED SOLELY IN A FIRST REGION, THE DISTANCE BETWEEN THE CONTACTS DEFININF A LENGTH OF SAID FIRST REGION, THE CRYSTALLOGRAPHIC AXIS OF THE SEMICONDUCTOR BEING SUCH THAT SAID FIRST REGION HAS GREATER PIEZORSISTANCE ALONG SAID LENGTH THAN ALONG ITS WIDTH, AT LEAST ONE OF THE REMAINING SEMICONDUCTOR BODY REGIONS DISTINCT FROM THE REGION HAVING THE OHMIC CONTACTS THEREON BEING DEVOID OF EXTERNAL ELECTRICAL CONTACTS THEREON, WHEREBY THE PLURALITY OF P-N JUNCTIONS TEND TO ISOLATE THE REGION HAVING THE CONTACTS THEREON.
Claim 2
Dependent Claim
118 words
A STRAIN GAGE ELEMENT COMPRISING: A UNITIZED SEMICONDUCTOR BODY HAVING AT LEAST THREE REGIONS THEREON WITH TWO P-N JUNCTIONS FORMED THEREIN IN SPACED RELATION WITH EACH OTHER AND DISPOSED BETWEEN ABUTTING REGIONS, AND A PAIR OF OHMIC CONTACTS PLACED SOLELY IN A FIRST REGION, THE DISTANCE BETWEEN THE CONTACTS DEFININF A LENGTH OF SAID FIRST REGION, THE CRYSTALLOGRAPHIC AXIS OF THE SEMICONDUCTOR BEING SUCH THAT SAID FIRST REGION HAS GREATER PIEZORSISTANCE ALONG SAID LENGTH THAN ALONG ITS WIDTH, AT LEAST ONE OF THE REMAINING SEMICONDUCTOR BODY REGIONS DISTINCT FROM THE REGION HAVING THE OHMIC CONTACTS THEREON BEING DEVOID OF EXTERNAL ELECTRICAL CONTACTS THEREON, WHEREBY THE PLURALITY OF P-N JUNCTIONS TEND TO ISOLATE THE REGION HAVING THE CONTACTS THEREON.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |