Patent US3223074A successfully refreshed from Google Patents.
US3223074A
Expired / Lapsed
US
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Method and boiler plant for combustion of fuels
Assignee: Von Roll AG
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Filing: 1965-02-17
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Granted: 1965-12-14
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Expires: 1985-02-17
Abstract
No abstract record available.
Inventors
- 👤 Tanner Richard
- 👤 Perl Karl
- 👤 Bauer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:08
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/46; F22; F22B; F22B31/00; F22B31/04; F22B31/045; F23; F23C; F23C1/00; F23C1/02; F23G; F23G5/00; F23G5/44; F23G5/46; Y; Y02; Y02E; Y02E20/00; Y02E20/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A METHOD OF BURNING DIFFERENT GRADES OF FUEL IN A BOILER INSTALLATION INCORPORATING A STEAM GENERATOR PROVIDED WITH AT LEAST TWO OPERATIVELY INTERCONNECTED HEATING SYSTEMS, ONE OF WHCIH DEFINES ONLY A PRE-HEATER BOILER SECTION AND THE OTHER ONLY A SUPERHEATING BOILER SECTION, COMPRISING THE STEPS OF CONCURRENTLY BURING THE DIFFERENT GRADES OF FUEL IN SEPARATE COMBUSTION CHAMBERS OF SAID BOILER INSTALLATION, CONDUCTING THE RESPECTIVE STREAMS OF FLUE GAS EMANATING FROM EACH FUEL THUS BURNED THROUGH A SEPARATE FLOW PATH IN SAID BOILER INSTALLATION WITH MIXING OF SAID FLUE GASES IN SAID BOILER INSTALLATION, THE STREAM OF FLUE GAS EMANATING FROM BURNING THE LOW-GRADE FUEL BEING CONDUCTED IN HEAT-EXCHANGE RELATIONSHIP PAST THE PRE-HEATER BOILER SECTION AND THE STREAM OF FLUE GAS EMANATING FROM BURNING THE HIGH-GRADE FUEL BEING CONDUCTED IN HEAT-EXCHANGE RELATIONSHIP PAST THE SUPERHEATING BOILER SECTION, AND RE-COMBINING SAID RESPECTIVE STREAMS OF FLUE GAS EXTERNALLY OF SAID BOILER INSTALLATION.
Claim 2
Independent Claim
149 words
A METHOD OF BURNING DIFFERENT GRADES OF FUEL IN A BOILER INSTALLATION INCORPORATING A STEAM GENERATOR PROVIDED WITH AT LEAST TWO OPERATIVELY INTERCONNECTED HEATING SYSTEMS, ONE OF WHCIH DEFINES ONLY A PRE-HEATER BOILER SECTION AND THE OTHER ONLY A SUPERHEATING BOILER SECTION, COMPRISING THE STEPS OF CONCURRENTLY BURING THE DIFFERENT GRADES OF FUEL IN SEPARATE COMBUSTION CHAMBERS OF SAID BOILER INSTALLATION, CONDUCTING THE RESPECTIVE STREAMS OF FLUE GAS EMANATING FROM EACH FUEL THUS BURNED THROUGH A SEPARATE FLOW PATH IN SAID BOILER INSTALLATION WITH MIXING OF SAID FLUE GASES IN SAID BOILER INSTALLATION, THE STREAM OF FLUE GAS EMANATING FROM BURNING THE LOW-GRADE FUEL BEING CONDUCTED IN HEAT-EXCHANGE RELATIONSHIP PAST THE PRE-HEATER BOILER SECTION AND THE STREAM OF FLUE GAS EMANATING FROM BURNING THE HIGH-GRADE FUEL BEING CONDUCTED IN HEAT-EXCHANGE RELATIONSHIP PAST THE SUPERHEATING BOILER SECTION, AND RE-COMBINING SAID RESPECTIVE STREAMS OF FLUE GAS EXTERNALLY OF SAID BOILER INSTALLATION.
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |