Patent US2951775A successfully refreshed from Google Patents.
US2951775A
Expired / Lapsed
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Selective saccharification of cellulosic materials
Assignee: Udic SA
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Filing: 1957-12-12
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Granted: 1960-09-06
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Expires: 1977-12-12
Abstract
No abstract record available.
Inventors
- 👤 Apel Alfons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:27
CPC Classifications
C; C13; C13K; C13K13/00; C13K13/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE TWO-STEP HYDROCHLORIC ACID SACCHARIFICATION OF A VEGETABLE CELLULOSIC MATERIAL AT TEMPERATURES OF ABOUT 15 TO 30*C., THE STEPS OF FIRST TREATING SAID MATERIAL WITH AN ESSENTIALLY ALCOHOLIC SOLUTION OF HYDROCHLORIC ACID OF ABOUT 29 TO 37 PERCENT BY WEIGHT, THE ALCOHOL BEING AN ALIPHATIC ALCOHOL CONTAINING 1 TO 3 CARBON ATOMS, THEREBY OBTAINING AS HYDROLYSIS PRODUCT SUBSTANTIALLY PENTOSES DISSOLVED IN SAID SOLUTION, DISPLACING SAID ALCOHOLIC PENTOSES CONTAINING HYDROCHLORIC ACID SOLUTION BY AN AQUEOUS 39 TO 42 PERCENT HYDROCHLORIC ACID SOLUTION, AND REACTING THE CELLULOSIC MATERIAL WITH SAID AQUEOUS SOLUTION, THEREBY OBTAINING AN AQUEOUS HYDROCHLORIC ACID SOLUTION OF HEXOSES.
Claim 2
Dependent Claim
100 words
IN THE TWO-STEP HYDROCHLORIC ACID SACCHARIFICATION OF A VEGETABLE CELLULOSIC MATERIAL AT TEMPERATURES OF ABOUT 15 TO 30*C., THE STEPS OF FIRST TREATING SAID MATERIAL WITH AN ESSENTIALLY ALCOHOLIC SOLUTION OF HYDROCHLORIC ACID OF ABOUT 29 TO 37 PERCENT BY WEIGHT, THE ALCOHOL BEING AN ALIPHATIC ALCOHOL CONTAINING 1 TO 3 CARBON ATOMS, THEREBY OBTAINING AS HYDROLYSIS PRODUCT SUBSTANTIALLY PENTOSES DISSOLVED IN SAID SOLUTION, DISPLACING SAID ALCOHOLIC PENTOSES CONTAINING HYDROCHLORIC ACID SOLUTION BY AN AQUEOUS 39 TO 42 PERCENT HYDROCHLORIC ACID SOLUTION, AND REACTING THE CELLULOSIC MATERIAL WITH SAID AQUEOUS SOLUTION, THEREBY OBTAINING AN AQUEOUS HYDROCHLORIC ACID SOLUTION OF HEXOSES.
References Cited (Backward Citations)
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US1919623A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |