US3333462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strain gauges
Assignee: Hitachi Ltd
•
Filing: 1964-05-04
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Granted: 1967-08-01
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Doi Toshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:36
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; C; C22; C22C; C22C5/00; G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2287
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A METHOD FOR MEASURING A STRAIN BY MEANS OF AN ELECTRICAL RESISTANCE STRAIN GAUGE ADAPTED TO BE ATTACHED TO A BODY FOR MEASURING A STRAIN APPLIED TO THE GAUGE FROM THE BODY WHICH COMPRISES DETECTING SAID STRAIN WITH A MEASURING ELEMENT COMPOSED OF AN ALLOY CONSISTING ESSENTIALLY OF ABOUT 20.0-52.2 ATOMIC PERCENT PLATINUM, ABOUT 11.3-33.5 ATOMIC PERCENT RHODIUM AND ABOUT 14.050.5 ATOMIC PERCENT PALLADIUM, SAID ALLOY EXHIBITING A THERMAL ELECTROMOTIVE FORCE RELATIVE TO COPPER OF ABOUT +2UV./*C. TO -2UV/*C. AND HAVING A TEMPERATURE COEFFICIENT OF RESISTANCE NOT GREATER THAN 1.5X10**3.
References Cited (Backward Citations)
US2166055A
Cited
US2920298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |