US3054700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning heat exchangers
Assignee: BP PLC
•
Filing: 1960-10-12
•
Granted: 1962-09-18
•
Expires: 1980-10-12
Abstract
No abstract record available.
Inventors
- 👤 Martin Ronald John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:10
CPC Classifications
F; F28; F28G; F28G13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD FOR REMOVING COMBUSTIBLE MATERIAL FROM HEAT EXCHANGING SURFACES IN HEAT EXCHANGERS OF THE SHELL AND TUBE TYPE USED AS CIRCULATING OIL HEATERS FOR HEATING A FURFURAL-EXTRACT MIXTURE IN FURFURAL EXTRACTION PROCESSES, PARTICULARLY THE INNER SURFACES OF THE HEAT EXCHANGER TUBES, WITHOUT REMOVING THE HEAT EXCHAGNER FROM ITS NORMAL OPERATING POSITION, COMPRISING: OXIDIZING THE COMBUSTIBLE MATERIAL ON ONE SIDE OF SAID HEAT EXCHANGING SURFACES UNDER CONTROLLED CONDITIONS IN THE PRESENCE OF A STREAM OF AN OXYGEN-CONTAINING GAS, BUT IN THE ABSENCE OF ANY ADDITIONAL FUEL AND IN THE ABSENCE OF THE PRODUCTS OF COMBUSTION OF ANY ADDITIONAL FUEL, WHILE MAINTAINING THE OXIDIZING TEMPERATURE BELOW ABOUT 350* C. BY PASSING A SUITABLE MEDIUM COMPRISING A HYDROCARBON MIXTURE THROUGH THE SIDE OF THE HEAT EXCHANGER WHICH IS NOT BEING CLEANED.
Claim 2
Independent Claim
129 words
A METHOD FOR REMOVING COMBUSTIBLE MATERIAL FROM HEAT EXCHANGING SURFACES IN HEAT EXCHANGERS OF THE SHELL AND TUBE TYPE USED AS CIRCULATING OIL HEATERS FOR HEATING A FURFURAL-EXTRACT MIXTURE IN FURFURAL EXTRACTION PROCESSES, PARTICULARLY THE INNER SURFACES OF THE HEAT EXCHANGER TUBES, WITHOUT REMOVING THE HEAT EXCHAGNER FROM ITS NORMAL OPERATING POSITION, COMPRISING: OXIDIZING THE COMBUSTIBLE MATERIAL ON ONE SIDE OF SAID HEAT EXCHANGING SURFACES UNDER CONTROLLED CONDITIONS IN THE PRESENCE OF A STREAM OF AN OXYGEN-CONTAINING GAS, BUT IN THE ABSENCE OF ANY ADDITIONAL FUEL AND IN THE ABSENCE OF THE PRODUCTS OF COMBUSTION OF ANY ADDITIONAL FUEL, WHILE MAINTAINING THE OXIDIZING TEMPERATURE BELOW ABOUT 350* C. BY PASSING A SUITABLE MEDIUM COMPRISING A HYDROCARBON MIXTURE THROUGH THE SIDE OF THE HEAT EXCHANGER WHICH IS NOT BEING CLEANED.
References Cited (Backward Citations)
US2057441A
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US2289351A
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US2332800A
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US2423157A
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US2577254A
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US2671741A
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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) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |