Patent US3397110A successfully refreshed from Google Patents.
US3397110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning of heat exchangers used with cellulose digesters
Assignee: Rosenblad Corp
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Filing: 1965-03-08
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Granted: 1968-08-13
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Curt F Rosenblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:57
CPC Classifications
F; F28; F28G; F28G5/00; D; D21; D21C; D21C7/00; D21C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF CLEANING THE WALLS BORDERING THE LIQUOR PASSAGES OF AN INDIRECT HEAT EXCHANGER UTILIZED FOR THE HEATING OF COOKING LIQUOR FOR A DIGESTER BY CAUSING SAID LIQUOR TO FLOW IN ONE DIRECTION THROUGH SAID PASSAGES WHICH COMPRISES, TERMINATING THE FLOW OF SAID LIQUOR IN SAID ONE DIRECTION AT SUBSTANTIALLY THE END OF A COOK, THEN WITHDRAWING HEATED COOKING LIQUOR UNDER PRESSURE FROM SAID DIGESTER AND PASSING SUCH COOKING LIQUOR THROUGH SAID LIQUOR PASSAGES IN REVERSE DIRECTION TO THE FLOW OF LIQUOR THROUGH SAID PASSAGES DURING THE HEATING OF SAID LIQUOR FOR COOKING.
Claim 2
Independent Claim
94 words
THE METHOD OF CLEANING THE WALLS BORDERING THE LIQUOR PASSAGES OF AN INDIRECT HEAT EXCHANGER UTILIZED FOR THE HEATING OF COOKING LIQUOR FOR A DIGESTER BY CAUSING SAID LIQUOR TO FLOW IN ONE DIRECTION THROUGH SAID PASSAGES WHICH COMPRISES, TERMINATING THE FLOW OF SAID LIQUOR IN SAID ONE DIRECTION AT SUBSTANTIALLY THE END OF A COOK, THEN WITHDRAWING HEATED COOKING LIQUOR UNDER PRESSURE FROM SAID DIGESTER AND PASSING SUCH COOKING LIQUOR THROUGH SAID LIQUOR PASSAGES IN REVERSE DIRECTION TO THE FLOW OF LIQUOR THROUGH SAID PASSAGES DURING THE HEATING OF SAID LIQUOR FOR COOKING.
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |