US3608376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xeritron
Assignee: HYGROMETRIX Inc
•
Filing: 1969-06-17
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Granted: 1971-09-28
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Expires: 1989-06-17
Abstract
Abstract A HUMIDITY SENSITIVE ELEMENT OR CHIP TO WHICH AN ELECTRICAL STRAIN GAUGE, OR MORE SPECIFICALLY, A "PIXIE" TRANSDUCER, IS ATTACHED. WHILE THE CHIP IS IN THE FULLY SATURATED STATE, IT IS MOUNTED ON THE BACK OF THE PIXIE STRAIN GAUGE AS BY SOLDERING THE ENDS THERETO. WHILE THE STRAIN GAUGE WILL RESIST BENDING, THE XERIC CHIP EXERTS A BENDING FORCE UPON IT WHICH EFFECTS ITS PIEZORESISTIVE CHARACTERISTICS DIRECTLY PROPORTIONAL TO THE FORCE ON THE CHIP WHICH, IN TURN, IS DIRECTLY PROPORTIONAL TO THE DRYNESS OF THE ENVIRONMENT IN WHICH THE DEVICE IS PLACED.
Inventors
- 👤 Ralph L Fenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:32
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |