US2671741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decoking and cleaning tubular heaters
Assignee: Texaco Inc
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Filing: 1950-02-23
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Granted: 1954-03-09
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Expires: 1970-02-23
Abstract
No abstract record available.
Inventors
- 👤 William J Duvall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:23
CPC Classifications
F; F28; F28G; F28G13/00; F28G13/005; C; C10; C10G; C10G9/00; C10G9/14; C10G9/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
IN THE DECOKING AND CLEANING OF TUBULAR HEATERS CONTAINING COKE AND SALTS DEPOSITED THEREIN FROM THE HEATING OF HYDROCARBON OILS CONTAINING SALTS, THE PROCESS THAT COMPRISES REDISTRIBUTING THE SALT CONTENT OF THE DEPOSIT BY CHARGING WATER TO THE TUBULAR HEATER AND APPLYING TO THE EXTERNAL TUBE SURFACES A TEMPERATURE SUFFICIENT TO EFFECT VAPORIZATION OF THE WATER, AND FINALLY PASSING AIR THORUGH TUBES MAINTAINED AT A TEMPERATURE SUFFICIENT TO EFFECT BURNING OF THE DEPOSITS SO THAT THE TUBES ARE FREED OF BOTH SALT AND COKE DEPOSITS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |