Patent US3332280A successfully refreshed from Google Patents.
US3332280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strain gauge for large extensions
Assignee: Dracone Developments Ltd
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Filing: 1965-03-26
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Granted: 1967-07-25
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Expires: 1985-03-26
Abstract
No abstract record available.
Inventors
- 👤 Fish Daniel Cccil Edward
- 👤 Campbell Robert Brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:05
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029; G; G01; G01B; G01B7/00; G01B7/16; G01L; G01L1/00; G01L1/20; H01C; H01C10/00; H01C10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A STRAIN GAUGE COMPRISING A TUBE OF AN ELASTOMER MATERIAL, A CONDUCTIVE ELECTRODE SEALED INTO EACH END OF THE TUBE, A FILLING FOR THE TUBE CONSISTING OF AN ELECTROLYTE INCLUDING A SOLVENT LIQUID, SAID TUBE COMPRISING AN INNER TUBULAR LAYER OF AN ELASTOMER MATERIAL WHICH IS RESISTANT TO ATTACK BY AND IS SUBSTANTIALLY IMPERVIOUS TO THE ELECTROLYTE, AND AN OUTER TUBULAR LAYER OF AN ELASTOMER MATERIAL WHICH IS HIGHLY IMPERVIOUS TO LIQUIDS AND MAY BE RESISTANT TO ATTACK BY THE ELECTROLYTE, THE INNER TUBULAR LAYER BEING SATURATED WITH THE SOLVENT LIQUID OF THE ELECTROLYTE, THE TWO TUBULAR LAYERS BEING SEALED TO ONE ANOTHER AT THEIR ENDS WHEREBY THE ESCAPE OF ELECTROLYTE IS HINDERED AND WHEREBY THE OUTER TUBULAR LAYER IS PROTECTED FROM ATTACK BY THE ELECTROLYTE.
Claim 2
Dependent Claim
126 words
A STRAIN GAUGE COMPRISING A TUBE OF AN ELASTOMER MATERIAL, A CONDUCTIVE ELECTRODE SEALED INTO EACH END OF THE TUBE, A FILLING FOR THE TUBE CONSISTING OF AN ELECTROLYTE INCLUDING A SOLVENT LIQUID, SAID TUBE COMPRISING AN INNER TUBULAR LAYER OF AN ELASTOMER MATERIAL WHICH IS RESISTANT TO ATTACK BY AND IS SUBSTANTIALLY IMPERVIOUS TO THE ELECTROLYTE, AND AN OUTER TUBULAR LAYER OF AN ELASTOMER MATERIAL WHICH IS HIGHLY IMPERVIOUS TO LIQUIDS AND MAY BE RESISTANT TO ATTACK BY THE ELECTROLYTE, THE INNER TUBULAR LAYER BEING SATURATED WITH THE SOLVENT LIQUID OF THE ELECTROLYTE, THE TWO TUBULAR LAYERS BEING SEALED TO ONE ANOTHER AT THEIR ENDS WHEREBY THE ESCAPE OF ELECTROLYTE IS HINDERED AND WHEREBY THE OUTER TUBULAR LAYER IS PROTECTED FROM ATTACK BY THE ELECTROLYTE.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |