US2546103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing hexitols by catalytic reduction of carbohydrates
Assignee: Scholtens Chemische Fabrieken NV
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Filing: 1947-04-21
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Granted: 1951-03-20
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Expires: 1967-04-21
Abstract
No abstract record available.
Inventors
- 👤 Lolkema Jan
- 👤 Hendrik Adriaan Van Westen
- 👤 Vlugter Johannes Cornelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:54
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS OF MANUFACTURING POLYHYDRIC ALCOHOLS SUBSTANTIALLY CONSISTING OF SORBITOL BY LIQUID PHASE CONTINUOUS CATALYTIC REDUCTION OF MIXTURES OF GLUCOSE AND POLYMERS OF GLUCOSE OBTAINED BY HYDROLYSIS OF STARCH, WHICH COMPRISES FIRST HEATING SAID MIXTURE IN THE PRESENCE OF HYDROGEN AND A HYDROGENATING CATALYST AT SUPERATMOSPHERIC PRESSURE TO A TEMPERATURE NOT EXCEEDING 160* C., UNTIL AT LEAST THE BULK OF THE GLUCOSE IS REDUCED, AND THEREAFTER CONVERTING THE POLYMERS OF GLUCOSE INTO SORBITOL BY CONTINUING THE HYDROGENATING TREATMENT AT A TEMPERATURE ABOVE 180* C., BUT NOT SO HIGH AS TO EFFECT SPLITTING OF THE CARBON-CARBON BOND, AND STOPPING THE HYDROGENATING TREATMENT WHEN SAID POLYMERS OF GLUCOSE HAVE BEEN REDUCED TO SORBITOL.
Claim 2
Dependent Claim
111 words
A PROCESS OF MANUFACTURING POLYHYDRIC ALCOHOLS SUBSTANTIALLY CONSISTING OF SORBITOL BY LIQUID PHASE CONTINUOUS CATALYTIC REDUCTION OF MIXTURES OF GLUCOSE AND POLYMERS OF GLUCOSE OBTAINED BY HYDROLYSIS OF STARCH, WHICH COMPRISES FIRST HEATING SAID MIXTURE IN THE PRESENCE OF HYDROGEN AND A HYDROGENATING CATALYST AT SUPERATMOSPHERIC PRESSURE TO A TEMPERATURE NOT EXCEEDING 160* C., UNTIL AT LEAST THE BULK OF THE GLUCOSE IS REDUCED, AND THEREAFTER CONVERTING THE POLYMERS OF GLUCOSE INTO SORBITOL BY CONTINUING THE HYDROGENATING TREATMENT AT A TEMPERATURE ABOVE 180* C., BUT NOT SO HIGH AS TO EFFECT SPLITTING OF THE CARBON-CARBON BOND, AND STOPPING THE HYDROGENATING TREATMENT WHEN SAID POLYMERS OF GLUCOSE HAVE BEEN REDUCED TO SORBITOL.
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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) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |