US2783283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenolysis of dialdehyde starch to erythritol and ethylene glycol
Assignee: Individual
•
Filing: 1955-11-25
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Granted: 1957-02-26
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Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 John W Sloan
- 👤 Bernard T Hofreiter
- 👤 Charles L Mchltretter
- 👤 Ivan A Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:19
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06; C; C07; C07C; C07C29/00; C07C29/09; C07C29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF PRODUCING A MIXTURE OF ERYTHRITOL AND ETHYLENE GLYCOL WHICH COMPRISES SUBJECTING TO HYDROGEN UNDER SUPERATMOSPHERIC PRESSURE AN AQUEOUS PREPARATION OF ALKALI DISPERSED DIALDEHYDE STARCH, SAID PREPARATION HAVING A DIALDEHYDE STARCH CONTENT OF 10 TO 50 PERCENT YET BEING IN A MOBILE, HIGHLY-FLUID STATE, IN THE PRESENCE OF A HYDROGENATING CATALYST AT A TEMPERATURE WITHIN THE RANGE OF 150 TO 230*C., MAINTAINING SAID CONDITION OF TEMPERATURE AND PRESSURE FOR A PERIOD OF 1 TO 12 HOURS, AND SEPARATING THE REACTION PRODUCT COMPRISING ERYTHRITOL AND ETHYLENE GLYCOL FROM SAID CATALYST.
Claim 2
Independent Claim
91 words
THE METHOD OF PRODUCING A MIXTURE OF ERYTHRITOL AND ETHYLENE GLYCOL WHICH COMPRISES SUBJECTING TO HYDROGEN UNDER SUPERATMOSPHERIC PRESSURE AN AQUEOUS PREPARATION OF ALKALI DISPERSED DIALDEHYDE STARCH, SAID PREPARATION HAVING A DIALDEHYDE STARCH CONTENT OF 10 TO 50 PERCENT YET BEING IN A MOBILE, HIGHLY-FLUID STATE, IN THE PRESENCE OF A HYDROGENATING CATALYST AT A TEMPERATURE WITHIN THE RANGE OF 150 TO 230*C., MAINTAINING SAID CONDITION OF TEMPERATURE AND PRESSURE FOR A PERIOD OF 1 TO 12 HOURS, AND SEPARATING THE REACTION PRODUCT COMPRISING ERYTHRITOL AND ETHYLENE GLYCOL FROM SAID CATALYST.
References Cited (Backward Citations)
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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) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |