Patent US3553196A successfully refreshed from Google Patents.
US3553196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-amylose starch acetate
Assignee: United States Department of Agriculture
•
Filing: 1969-07-10
•
Granted: 1971-01-05
•
Expires: 1989-07-10
Abstract
Abstract WATER-SOLUBLE FOOD PACKAGING FILMS ARE CAST FROM AQUEOUS DISPERSIONS PREPARED BY STEAM JET COOKING HIGHAMYLOSE CORN STARCH ACETATES OF D.S. 0.21 TO 0.31 AT 177*C. TO DISINTEGRATE THE GRANULES PRESENT. THE ACETATES WERE PRODUCED IN GRANULE FORM BY ACETYLATING HIGH-AMYLOSE CORN STARCH OF 70 PERCENT APPARENT AMYLOSE CONTENT WITH ACETIC ANHYDRIDE IN A MIXER AT 90* TO 95C. FOR 30 MINUTES USING 1.5 PERCENT SODIUM HYDROXIDE (BASED ON DRY STARCH) AS CATALYST.
Inventors
- 👤 Arthur M Mark
- 👤 Charles L Mehltretter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:10
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/14; C08L3/16; C08B; C08B33/00; C08B33/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |