US2944922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of spent sulphite liquor
Assignee: Sulphite Products Corp
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Filing: 1956-04-23
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Granted: 1960-07-12
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Expires: 1976-04-23
Abstract
No abstract record available.
Inventors
- 👤 Boggs Lawrence Allen
- 👤 Averill J Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:19
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A PROCESS FOR TREATING MATERIALS SELECTED FROM THE GROUP CONSISTING OF SPENT SULPHITE LIQUOR SOLIDS AND WOOD HYDROLYSATE SOLIDS CONTAINING CARBOHYDRATE MATERIALS AND WOOD EXTRACTIVES, THE STEPS OF MIXING AND REACTING SUBSTANTIALLY DRY SOLIDS SELECTED FROM SAID GROUP WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL ALCOHOLS AND CARBONYL COMPOUNDS HAVING LESS THAN EIGHT CARBON ATOMS TO FORM A SOLUBLE CARBOHYDRATE COMPOUND, IN THE PRESENCE OF FREE HYDROGEN ION, SAID SOLVENT TREATMENT BEING CARRIED OUT AT A TEMPERATURE BELOW ABOUT 55*C. AND REMOVING LIGNEOUS MATERIALS FROM THE CARBOHYDRATE SOLUTION.
Claim 2
Dependent Claim
93 words
IN A PROCESS FOR TREATING MATERIALS SELECTED FROM THE GROUP CONSISTING OF SPENT SULPHITE LIQUOR SOLIDS AND WOOD HYDROLYSATE SOLIDS CONTAINING CARBOHYDRATE MATERIALS AND WOOD EXTRACTIVES, THE STEPS OF MIXING AND REACTING SUBSTANTIALLY DRY SOLIDS SELECTED FROM SAID GROUP WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL ALCOHOLS AND CARBONYL COMPOUNDS HAVING LESS THAN EIGHT CARBON ATOMS TO FORM A SOLUBLE CARBOHYDRATE COMPOUND, IN THE PRESENCE OF FREE HYDROGEN ION, SAID SOLVENT TREATMENT BEING CARRIED OUT AT A TEMPERATURE BELOW ABOUT 55*C. AND REMOVING LIGNEOUS MATERIALS FROM THE CARBOHYDRATE SOLUTION.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |