Patent US3237448A successfully refreshed from Google Patents.
US3237448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equivalent operating time apparatus
Assignee: Howell Instruments Inc
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Filing: 1960-06-16
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Granted: 1966-03-01
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Expires: 1980-06-16
Abstract
No abstract record available.
Inventors
- 👤 John S Howell
- 👤 David V Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:40
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/02; G01K3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
MEANS FOR DETERMINING THE ELAPSED EQUIVALENT OPERATING TIME OF A JET ENGINE HAVING AN OPERATING LIFE BASED UPON THE TEMPERATURE GENERATED THEREBY DURING OPERATION, COMPRISING: MEANS FOR GENERATING DURING SAID OPERATION A SIGNAL WHICH IS A FUNCTION OF SAID TEMPERATURE AND REPRESENTS THE RATE OF CONSUMPTION OF THE MAXIMUM OPERATING LIFE OF SAID ENGINE AND TIME-INTEGRATION MEANS FOR RECEIVING AND INTEGRATING SAID SIGNAL WITH RESPECT TO TIME, WHEREBY THE RESULTING SUMMATION REPRESENTS THE ELAPSED EQUIVALENT OPERATING TIME OF SAID JET ENGINE.
Claim 2
Dependent Claim
81 words
MEANS FOR DETERMINING THE ELAPSED EQUIVALENT OPERATING TIME OF A JET ENGINE HAVING AN OPERATING LIFE BASED UPON THE TEMPERATURE GENERATED THEREBY DURING OPERATION, COMPRISING: MEANS FOR GENERATING DURING SAID OPERATION A SIGNAL WHICH IS A FUNCTION OF SAID TEMPERATURE AND REPRESENTS THE RATE OF CONSUMPTION OF THE MAXIMUM OPERATING LIFE OF SAID ENGINE AND TIME-INTEGRATION MEANS FOR RECEIVING AND INTEGRATING SAID SIGNAL WITH RESPECT TO TIME, WHEREBY THE RESULTING SUMMATION REPRESENTS THE ELAPSED EQUIVALENT OPERATING TIME OF SAID JET ENGINE.
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |