Patent US2836591A successfully refreshed from Google Patents.
US2836591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of starch hydrolyzates with
Assignee: —
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Filing: —
•
Granted: 1958-05-27
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Expires: 1975-05-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:00
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/003; A; A23; A23L; A23L29/00; A23L29/30; A23L29/35; C08B30/00; C08B30/12; C12; C12P; C12P19/00; C12P19/14; C13; C13K; C13K1/00; C13K1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR PRODUCING A CARBOHYDRATE MATERIAL WHICH COMPRISES DEHYDRATING A STARCH HYDROLYSIS LIQUOR HAVING A D. E. VALUE FROM ABOUT 5 TO ABOUT 40 TO A MOISTURE CONTENT BELOW ABOUT 10 PERCENT, HEATING THE DRIED PRODUCT IN CONTACT WITH FORMALDEHYDE AND IN THE PRESENCE OF AN ACID CATALYST AT A PH OF FROM ABOUT 1.5 TO ABOUT 4.5 AND AT A TEMPERATURE BETWEEN ABOUT 90*C. AND 200*C. TO POLYMERIZE COMPONENTS OF SAID PRODUCT, THE AMOUNT OF FORMALDEHYDE NOT EXCEEDING ABOUT 2 PER CENT CALCULATED AS ANHYDROUS ALDEHYDE BASED ON THE DEHYDRATED SUBSTANCE.
Claim 2
Dependent Claim
93 words
A PROCESS FOR PRODUCING A CARBOHYDRATE MATERIAL WHICH COMPRISES DEHYDRATING A STARCH HYDROLYSIS LIQUOR HAVING A D. E. VALUE FROM ABOUT 5 TO ABOUT 40 TO A MOISTURE CONTENT BELOW ABOUT 10 PERCENT, HEATING THE DRIED PRODUCT IN CONTACT WITH FORMALDEHYDE AND IN THE PRESENCE OF AN ACID CATALYST AT A PH OF FROM ABOUT 1.5 TO ABOUT 4.5 AND AT A TEMPERATURE BETWEEN ABOUT 90*C. AND 200*C. TO POLYMERIZE COMPONENTS OF SAID PRODUCT, THE AMOUNT OF FORMALDEHYDE NOT EXCEEDING ABOUT 2 PER CENT CALCULATED AS ANHYDROUS ALDEHYDE BASED ON THE DEHYDRATED SUBSTANCE.
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |