US3213834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Washing out tubeside deposits
Assignee: Individual
•
Filing: 1964-07-30
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Granted: 1965-10-26
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Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 Heathcote John
- 👤 Francis R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:13
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/48; F22B37/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A ONCE-THROUGH BOILER EVAPORATOR SYSTEM ARRANGED FOR WASHING OUT TUBESIDE DEPOSITS, COMPRISING: TWO SEPARATE EVAPORATION CIRCUITS FOR EVAPORATING LIQUID FLOWING THERETHROUGH, A FIRST FLOW PATH FOR CONNECTING SAID CIRCUITS IN SERIES WITH EACH CIRCUIT HAVING A PREDETERMINED DIRECTION OF FLOW, A SECOND FLOW PATH FOR CONNECTING SAID CURCUITS IN SERIES BUT IN REVERSE ORDER AND WITH EACH CIRCUIT HAVING THE SAME PREDETERMINED DIRECTION OF FLOW AS WITH SAID FIRST FLOW PATH, AND MEANS FOR OPENING ONE FLOW PATH AND CLOSING THE OTHER FLOW PATH.
Claim 2
Dependent Claim
84 words
A ONCE-THROUGH BOILER EVAPORATOR SYSTEM ARRANGED FOR WASHING OUT TUBESIDE DEPOSITS, COMPRISING: TWO SEPARATE EVAPORATION CIRCUITS FOR EVAPORATING LIQUID FLOWING THERETHROUGH, A FIRST FLOW PATH FOR CONNECTING SAID CIRCUITS IN SERIES WITH EACH CIRCUIT HAVING A PREDETERMINED DIRECTION OF FLOW, A SECOND FLOW PATH FOR CONNECTING SAID CURCUITS IN SERIES BUT IN REVERSE ORDER AND WITH EACH CIRCUIT HAVING THE SAME PREDETERMINED DIRECTION OF FLOW AS WITH SAID FIRST FLOW PATH, AND MEANS FOR OPENING ONE FLOW PATH AND CLOSING THE OTHER FLOW PATH.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |