US3251748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch derivative
Assignee: National Industrial Products Co
•
Filing: 1963-08-23
•
Granted: 1966-05-17
•
Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Robert L High
- 👤 Rogols Saul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:56
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
A PROCESS OF TREATING STARCH WHICH CONSISTS OF THE STEPS OF ADDING ZINC CHLORIDE TO STARCH IN A PROPORTION OF ABOUT 1.5 PATS OF THE ZINC CHLORIDE SALT TO A MILLION PARTS OF STARCH BASED ON THE DRY WEIGHT OF THE STARCH: MIXING TO A SUBSTANTIALLY HOMOGENEOUS CONDITION; ADDING AN AMYLASE; RAISING THE TEMPERATURE TO AND MAINTAINING AN ENZYME ACTIVATING TEMPERATURE OF ABOUT 75*C. FOR A PERIOD OF TIME OF FROM 6 TO 14 MINUTES; AND INCREASNG THE TEMPERATURE TO ABOUT 95*C. TO DEACTIVATE AND TERMINATE THE ENZYME ACTION.
References Cited (Backward Citations)
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US2380848A
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US2619428A
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US2709672A
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US2783167A
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US3151038A
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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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |