US3732207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dextrins and starch esters
Assignee: Anheuser Busch Companies LLC
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Filing: 1971-01-29
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Granted: 1973-05-08
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Expires: 1991-01-29
Abstract
Abstract THE DISCLOSURE DESCRIBES A STARCH REACTION PRODUCT OF DIBASIC ORGANIC ACID ANHYDRIDES AND SPECIFICALLY STARCH DEXTRIN ESTERS AND THIN BOILING STARCH ESTERS OF DIBASIC ORGANIC ACID ANHYDRIDES, PREFERABLY SCCINIC OR MALEIC ANHYDRIDES. THE PRODUCT IS MADE BY AN ESSENTIALLY DRY PROCESS INVOLVING THE HEATING OF INTIMATELY CONTACTED STARCH OR STARCH DEXTRIN WITH DIBASIC ORGANIC ACID ANHYDRIDE AT A TEMPERATURE OF 100-155*C. IN THE PRESENCE OF ONLY 0.5 TO 15% MOISTURE FOR SELECTED TIMES TO PRODUCE A PRODUCT OF 0.02 TO 0.04 DEGREE OF SUBSTITUTION. THESE PRODUCTS ARE IN UNSWOLLEN GRANULE FORM AND ARE USEFUL AS ADHESIVES AND AS THICKENING AGENTS.
Inventors
- 👤 L Kovats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:26
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/04; C09; C09J; C09J103/00; C09J103/04; C09J103/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |