US3385268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating a once-through vapor generator
Assignee: Babcock and Wilcox Co
•
Filing: 1965-01-18
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Granted: 1968-05-28
•
Expires: 1985-01-18
Abstract
No abstract record available.
Inventors
- 👤 Sprague Theodore Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:58
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/023; F22B1/026; F22B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF OPERATING A ONCE-THROUGH STEAM GENERATOR HAVING A VESSEL OCCUPIED BY A BANK OF TUBES WHICH COMPRISES DIRECTING A HEATING FLUID THROUGH THE TUBES, SUPPLYING A VAPORIZABLE FEED FLUID TO THE VESSEL AT SUBCRITICAL PRESSURE AND VAPORIZING THE FEED FLUID BY DIRECTING IT OVER AND ALONG THE TUBES IN INDIRECT HEAT ABSORBING RELATION WITH THE HEATING FLUID AT A MASS FLOW LESS THAN 400,000 POUNDS PER HOUR PER SQUARE FOOT AND AT A VELOCITY IN THE RANGE OF 70 FEET PER SECOND TO 12 FEET PER SECOND.
Claim 2
Independent Claim
89 words
THE METHOD OF OPERATING A ONCE-THROUGH STEAM GENERATOR HAVING A VESSEL OCCUPIED BY A BANK OF TUBES WHICH COMPRISES DIRECTING A HEATING FLUID THROUGH THE TUBES, SUPPLYING A VAPORIZABLE FEED FLUID TO THE VESSEL AT SUBCRITICAL PRESSURE AND VAPORIZING THE FEED FLUID BY DIRECTING IT OVER AND ALONG THE TUBES IN INDIRECT HEAT ABSORBING RELATION WITH THE HEATING FLUID AT A MASS FLOW LESS THAN 400,000 POUNDS PER HOUR PER SQUARE FOOT AND AT A VELOCITY IN THE RANGE OF 70 FEET PER SECOND TO 12 FEET PER SECOND.
References Cited (Backward Citations)
GB536592A
Cited
US2336832A
Cited
FR1140383A
Cited
US2862479A
Cited
US3129697A
Cited
US3088494A
Cited
US3076444A
Cited
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Cited
US3250258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |