US2702235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical ash dissolving tank for black liquor recovery units
Assignee: Combustion Engineering Inc
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Filing: 1951-03-20
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Granted: 1955-02-15
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Expires: 1971-03-20
Abstract
No abstract record available.
Inventors
- 👤 Frank W Hochmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:44
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/06; D21C11/063; D21C11/066; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN A SYSTEM FOR RECOVERING CHEMICAL AND DERIVING HEAT FROM THE WASTE LIQUOR OF PULP MILLS WHICH SYSTEM HAS A SMELTER AND A WASTE HEAT BOILER UNIT, SAID BOILER UNIT HAVING ONE OR MORE REGIONS FOR THE COLLECTION OF CHEMICAL DUST FORMED BY THE CONDENSATION OF VAPORIZED CHEMICALS THROUGH THE ABSORPTION OF HEAT; THE COMBINATION OF A FIRST TANK ADAPTED TO HOLD A SUPPLY OF WASTE LIQUOR TO BE PROCESSED, SAID FIRST TANK HAVING A LIQUID OUTFLOW WHICH FIXES A PREDETERMINED FIRST LIQUID LEVEL; A SECOND TANK ADAPTED TO CONTAIN A BODY OF LIQUID AND HAVING A LIQUID OVERFLOW WHICH FIXES IN SAID SECOND TANK A SECOND LIQUID LEVEL AT A HIGHER ELEVATION THAN SAID FIRST LIQUID LEVEL; AN CONDUIT CONNECTING THE AFORESAID REGION FOR DUST COLLECTION WITH SAID SECOND TANK FOR ABSORBING COLLECTED DUST IN THE BODY OF LIQUID THEREIN THEREBY TENDING TO INCREASE THE VOLUME THEREOF; COMMUNNICATION MEANS BETWEEN SAID SECOND TANK AND SAID FIRST
Claim 2
Dependent Claim
157 words
IN A SYSTEM FOR RECOVERING CHEMICAL AND DERIVING HEAT FROM THE WASTE LIQUOR OF PULP MILLS WHICH SYSTEM HAS A SMELTER AND A WASTE HEAT BOILER UNIT, SAID BOILER UNIT HAVING ONE OR MORE REGIONS FOR THE COLLECTION OF CHEMICAL DUST FORMED BY THE CONDENSATION OF VAPORIZED CHEMICALS THROUGH THE ABSORPTION OF HEAT; THE COMBINATION OF A FIRST TANK ADAPTED TO HOLD A SUPPLY OF WASTE LIQUOR TO BE PROCESSED, SAID FIRST TANK HAVING A LIQUID OUTFLOW WHICH FIXES A PREDETERMINED FIRST LIQUID LEVEL; A SECOND TANK ADAPTED TO CONTAIN A BODY OF LIQUID AND HAVING A LIQUID OVERFLOW WHICH FIXES IN SAID SECOND TANK A SECOND LIQUID LEVEL AT A HIGHER ELEVATION THAN SAID FIRST LIQUID LEVEL; AN CONDUIT CONNECTING THE AFORESAID REGION FOR DUST COLLECTION WITH SAID SECOND TANK FOR ABSORBING COLLECTED DUST IN THE BODY OF LIQUID THEREIN THEREBY TENDING TO INCREASE THE VOLUME THEREOF; COMMUNNICATION MEANS BETWEEN SAID SECOND TANK AND SAID FIRST
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) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |