US2750414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of organic acids and salts thereof from cellulosic materials
Assignee: Crossett Lumber Co
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Filing: 1952-11-03
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Granted: 1956-06-12
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Expires: 1972-11-03
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Chesley
- 👤 Charles W Montgomery
- 👤 Lloyd T Sandborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:41
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/295
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
PROCESS OF PRODUCING SATURATED MONOCARBOXYLIC ACIDS HAVING 1-3 CARBON ATOMS IN WHICH ONE OF THE HYDROGEN ATOMS ON THE CARBON ATOM ADJACENT THE CARBOXYL GROUP MAY BE SUBSTITUTED BY AN HYDROXYL GROUP, WHICH COMPRISES SUBJECTING A MIXTURE OF CELLULOSIC MATERIAL AND AN AQUEOUS ALKALINE SOLUTION TO A TEMPERATURE OF 250* C.-300* C. IN A CLOSED SYSTEM, THE RATIO OF WATER TO ALKALI AND THE RATIO OF WATER TO CELLULOSIC MATERIAL BEING AT LEAST 3.5 TO 1 AND AT LEAST 4 TO 1 RESPECTIVELY, ACIDIFYING THE REACTION MIXTURE AND THEREBY OBTAINING A MIXTURE OF SAID ACIDS IN AQUEOUS 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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |