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US3205158A
Expired / Lapsed
US
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Condition responsive devices
Assignee: Honeywell Inc
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Filing: 1962-10-04
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Granted: 1965-09-07
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Expires: 1982-10-04
Abstract
No abstract record available.
Inventors
- 👤 James J Renier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:33
CPC Classifications
G; G01; G01K; G01K17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A TIME TEMPERATURE INDICATING DEVICE WHEREIN A METAL MEMBER IS IN CONTACT WITH A POROUS MATRIX CONTAINING AN ACIDIC ELECTROLYTE SUBSTANCE AND WHEREIN HY DROXYL IONS ARE GENERATED IN THE ELECTROLYTE AT THE ELECTROLYTE-METAL INTERFACE AND MIGRATE ALONG SAID POROUS MATRIX AT A RATE PROPORTIONAL TO THE TEMPERATURE THE IMPROVEMENT WHICH COMPRISES AN ELECTROLYTE SUBSTANCE, INCLUDING AN OXIDIZING AGENT AND A REDUCING AGENT AS AN INDICATOR OF THE EXTENT OF MIGRATION OF SAID HYDROXYL IONS, IMPREGNATING SAID POROUS MATRIX; THE OXIDIZING AND REDUCING AGENTS BEING CHARACTERIZED IN THAT THEY ARE CAPABLE OF UNDERGOING AN IRREVERSIBLE OXIDATION-REDUCTION REACTION UNDER THE INFLUENCE OF INCREASING PH TO PRODUCE A MARKED COLOR CHANGE.
Claim 2
Dependent Claim
110 words
IN A TIME TEMPERATURE INDICATING DEVICE WHEREIN A METAL MEMBER IS IN CONTACT WITH A POROUS MATRIX CONTAINING AN ACIDIC ELECTROLYTE SUBSTANCE AND WHEREIN HY DROXYL IONS ARE GENERATED IN THE ELECTROLYTE AT THE ELECTROLYTE-METAL INTERFACE AND MIGRATE ALONG SAID POROUS MATRIX AT A RATE PROPORTIONAL TO THE TEMPERATURE THE IMPROVEMENT WHICH COMPRISES AN ELECTROLYTE SUBSTANCE, INCLUDING AN OXIDIZING AGENT AND A REDUCING AGENT AS AN INDICATOR OF THE EXTENT OF MIGRATION OF SAID HYDROXYL IONS, IMPREGNATING SAID POROUS MATRIX; THE OXIDIZING AND REDUCING AGENTS BEING CHARACTERIZED IN THAT THEY ARE CAPABLE OF UNDERGOING AN IRREVERSIBLE OXIDATION-REDUCTION REACTION UNDER THE INFLUENCE OF INCREASING PH TO PRODUCE A MARKED COLOR CHANGE.
References Cited (Backward Citations)
US2118144A
Cited
US2892798A
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US2970264A
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US3055759A
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US3045179A
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US3090234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |