US3112880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace control
Assignee: Phillips Petroleum Co
•
Filing: 1962-11-21
•
Granted: 1963-12-03
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Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 Lyle W Pollock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:29
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; C10G9/206
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
A METHOD FOR CONTROLLING HEAT INPUT TO A HEATED PASSAGEWAY WHICH COMPRISES DETERMINING TEMPERATURE DIFFERENCE BETWEEN TWO POINTS SPACED APART IN SAID PASSAGEWAY, CONTROLLING HEAT SUPPLIED TO SAID PASSAGEWAY RESPONSIVE TO SAID TEMPERATURE DIFFERENCE AND MODIFYING SAID CONTROLLING RESPONSIVE TO A COMPARISON OF SAID TEMPERATURE DIFFERENCE, BETWEEN SAID POINTS, WITH A TEMPERATURE DIFFERENCE WHICH IS PERMISSIBLE BETWEEN SAID POINTS FOR THE MEDIUM BEING HEATED, AT THE TEMPERATURE OF THE MEDIUM BETWEEN SAID TWO POINTS.
References Cited (Backward Citations)
US2015838A
Cited
US2494135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |