US2970140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing amino ethers of starch
Assignee: Cerestar USA Inc
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Filing: 1957-08-09
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Granted: 1961-01-31
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Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Hullinger
- 👤 Naoyuki H Yui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:48
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD OF MANUFACTURING AMINE STARCH IN GRANULAR FORM WHICH COMPRISES THE STEPS OF FORMING A SLURRY OF STARCH GRANULES IN WATER, ADDING BETWEEN ABOUT 0.0001. MOL TO 0.11 MOL OF DIALKYL BETA AMINE REAGENT FOR EACH MOL OF STARCH, ADDING ALKALI TO THE SLURRY IN AN AMOUNT BETWEEN ABOUT 0.04 MOL OF 0.12 MOL OF ALKALI FOR EACH MOL OF STARCH TO ESTABLISH REACTION BETWEEN THE AMINE REAGENT AND STARCH GRANULES IN THE ABSENCE OF INHIBITORS AGAINST STARCH GRANULE GELATINIZATION, MAINTAINING THE REACTION MIXTURE AT A TEMPERATURE BELOW THAT AT WHICH STARCH GRANULES GELATINIZE UNTIL REACTION IS COMPLETE, THEN AFTER REACTION HAS TAKEN PLACE NEUTRALIZING THE REACTION SLURRY WITH A SUITABLE ACID TO A PH BELOW 9.0 AND THEN DEWATERING THE REACTION SLURRY AND WASHING THE REACTION PRODUCT TO RECOVER AMINE STARCH IN THE FORM OF GRANULES, SAID BETA AMINE REAGENT HAVING THE GENERAL FORMULA
Claim 2
Independent Claim
146 words
THE METHOD OF MANUFACTURING AMINE STARCH IN GRANULAR FORM WHICH COMPRISES THE STEPS OF FORMING A SLURRY OF STARCH GRANULES IN WATER, ADDING BETWEEN ABOUT 0.0001. MOL TO 0.11 MOL OF DIALKYL BETA AMINE REAGENT FOR EACH MOL OF STARCH, ADDING ALKALI TO THE SLURRY IN AN AMOUNT BETWEEN ABOUT 0.04 MOL OF 0.12 MOL OF ALKALI FOR EACH MOL OF STARCH TO ESTABLISH REACTION BETWEEN THE AMINE REAGENT AND STARCH GRANULES IN THE ABSENCE OF INHIBITORS AGAINST STARCH GRANULE GELATINIZATION, MAINTAINING THE REACTION MIXTURE AT A TEMPERATURE BELOW THAT AT WHICH STARCH GRANULES GELATINIZE UNTIL REACTION IS COMPLETE, THEN AFTER REACTION HAS TAKEN PLACE NEUTRALIZING THE REACTION SLURRY WITH A SUITABLE ACID TO A PH BELOW 9.0 AND THEN DEWATERING THE REACTION SLURRY AND WASHING THE REACTION PRODUCT TO RECOVER AMINE STARCH IN THE FORM OF GRANULES, SAID BETA AMINE REAGENT HAVING THE GENERAL FORMULA
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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |