Patent US2593503A successfully refreshed from Google Patents.
US2593503A
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US
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Method of recovering heat and chemicals from the residual liquor resulting from the digestion of cellulosic fibrous material
Assignee: HOWARD SMITH PAPER MILLS Ltd
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Filing: 1946-01-10
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Granted: 1952-04-22
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Expires: 1966-01-10
Abstract
No abstract record available.
Inventors
- 👤 George H Tomlinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:13
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/06; D21C11/063; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S261/00; Y10S261/09; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF RECOVERING HEAT AND CHEMICALS FROM THE RESIDUAL LIQUOR RESULTING FROM THE DIGESTION OF CELLULOSIC FIBROUS MATERIAL IN A COOKING LIQUOR WHICH COMPRISES CONCENTRATING THE RESIDUAL LIQUOR AND ABSORBING GASEOUS SULPHUR OXIDES THEREIN BY THE DIRECT INTIMATE CONTACT OF THE RESIDUAL LIQUOR WITH HOT FLUE GASES CONTAINING GASEOUS SULPHUR OXIDES AND CHEMICAL FUME PARTICLES, SEPARATING THE RESIDUAL LIQUOR FROM THE FLUE GASES, PASSING THE FLUE GASES AFTER SEPARATING THE RESIDUAL LIQUOR THEREFROM IN A HELICAL FLOW PATH THROUGH A FUME RECOVERY ZONE IN INTIMATE CONTACT WITH A PLURALITY OF FINELY DIVIDED STREAMS
Claim 2
Independent Claim
94 words
THE METHOD OF RECOVERING HEAT AND CHEMICALS FROM THE RESIDUAL LIQUOR RESULTING FROM THE DIGESTION OF CELLULOSIC FIBROUS MATERIAL IN A COOKING LIQUOR WHICH COMPRISES CONCENTRATING THE RESIDUAL LIQUOR AND ABSORBING GASEOUS SULPHUR OXIDES THEREIN BY THE DIRECT INTIMATE CONTACT OF THE RESIDUAL LIQUOR WITH HOT FLUE GASES CONTAINING GASEOUS SULPHUR OXIDES AND CHEMICAL FUME PARTICLES, SEPARATING THE RESIDUAL LIQUOR FROM THE FLUE GASES, PASSING THE FLUE GASES AFTER SEPARATING THE RESIDUAL LIQUOR THEREFROM IN A HELICAL FLOW PATH THROUGH A FUME RECOVERY ZONE IN INTIMATE CONTACT WITH A PLURALITY OF FINELY DIVIDED STREAMS
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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |