Patent US3186228A successfully refreshed from Google Patents.
US3186228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time-temperature integrator
Assignee: General Electric Co
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Filing: 1960-06-30
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Granted: 1965-06-01
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Expires: 1980-06-30
Abstract
No abstract record available.
Inventors
- 👤 Ray C Lever
- 👤 Thomas O Paine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:07
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/02; G01K3/04; G01K17/00; G01K17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A DEVICE FOR MEASURING A CHANGE IN A PHYSICAL PARAMETER OF AN ELEMENT EXPOSED TO HEAT WHICH IS PROPORTIONAL TO A COMPLEX INTEGRAL OF TIME AND TEMPERATURE COMPRISING, A DETECTOR COMPRISED OF FIRST AND SECOND ELECTRICALLY CONDUCTIVE MATERIALS IN INTIMATE CONTACT, SAID MATERIALS BEING SELECTED SO THAT SAID SENSOR IS SUBJECT TO A CHANGE IN RESISTIVITY DUE TO DIFFUSION OF ONE OF SAID MATERIALS INTO THE OTHER, SAID RESISTIVITY CHANGE BEING PROPORTIONAL TO SAID COMPLEX INTEGRAL OF TIME AND TEMPERATURE, A HEAT SOURCE OF VARYING OUTPUT TO WHICH SAID ELEMENT IS EXPOSED, MEANS TO EXPOSE SAID DETECTOR TO HEAT FROM SAID SOURCE, AND
Claim 2
Independent Claim
103 words
A DEVICE FOR MEASURING A CHANGE IN A PHYSICAL PARAMETER OF AN ELEMENT EXPOSED TO HEAT WHICH IS PROPORTIONAL TO A COMPLEX INTEGRAL OF TIME AND TEMPERATURE COMPRISING, A DETECTOR COMPRISED OF FIRST AND SECOND ELECTRICALLY CONDUCTIVE MATERIALS IN INTIMATE CONTACT, SAID MATERIALS BEING SELECTED SO THAT SAID SENSOR IS SUBJECT TO A CHANGE IN RESISTIVITY DUE TO DIFFUSION OF ONE OF SAID MATERIALS INTO THE OTHER, SAID RESISTIVITY CHANGE BEING PROPORTIONAL TO SAID COMPLEX INTEGRAL OF TIME AND TEMPERATURE, A HEAT SOURCE OF VARYING OUTPUT TO WHICH SAID ELEMENT IS EXPOSED, MEANS TO EXPOSE SAID DETECTOR TO HEAT FROM SAID SOURCE, AND
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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) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |