Patent US4340047A successfully refreshed from Google Patents.
US3374950A
Expired / Lapsed
US
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Photo-pyrometric control system for efficient combustion in multiple-burner, residual-fuel-fired furnaces
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1965-04-12
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Granted: 1968-03-26
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Expires: 1985-04-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Menzel
- 👤 John E Gerrard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:50
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N3/00; F23N3/002; F23N2223/00; F23N2223/18; F23N2229/00; F23N2229/06; F23N2229/16; F23N2237/00; F23N2237/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
APPARATUS FOR THE CONTROL OF A MULTIPLE BURNER FURNACE COMPRISING MEANS FOR MEASURING THE RADIATION OF EACH BURNER FLAME; A STANDARD RADIATION SOURCE; MEANS FOR CONVERTING THE MEASURED RADIATION OF EACH BURNER FLAME AND OF SAID STANDARD RADIATION SOURCE TO PROPORTIONALLY EQUIVALENT ELECTRICAL SIGNALS; MEANS FOR SEQUENTIALLY COMPARING EACH ELECTRICAL SIGNAL PROPORTIONAL TO SAID RADIATION OF EACH BURNER FLAME WITH THE ELECTRICAL SIGNAL FROM SAID STANDARD RADIATION SOURCE; AND MEANS RESPONSIVE TO THE DIFFERENCE BETWEEN THE COMPARED SIGNAL LEVELS FOR ADJUSTING THE AIR-FUEL SUPPLY TO EACH BURNER.
References Cited (Backward Citations)
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US2306073A
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US2337410A
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US2518996A
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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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |