US2698818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of starch conversion products
Assignee: Blattmann and Co AG
•
Filing: 1951-02-01
•
Granted: 1955-01-04
•
Expires: 1971-02-01
Abstract
No abstract record available.
Inventors
- 👤 Max A Staerkle
- 👤 Meier Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:22
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
PROCESS FOR PRODUCING STARCH CONVERSION PRODUCTS WHICH COMPRISES PLACING A POWDERY MASS OF FINELY DIVIDED STARCH IN A CONTAINER AND, WHILE CONTINOUSLY STIRRING THE MASS IN/THE CONTAINER: FORMING A VACUUM THEREIN, THEN INTRODUCING HYDROGEN CHLORIDE GAS TO ACIDIFY THE MASS; THEN HEATING THE MASS UNDER CONTINUED VACUUM AT TEMPERATURES BELOW 130*C. AND THUS DEHYDRATING IT UNTIL ITS MOISTURE CONTENT IS BELOW 1%: THEN UNDER CONTINUED VACUUM INCREASING THE HEATING TEMPERATURE TO ONE BETWEEN 130* AND 180*C., DEPENDING UPON THE DEGREE OF DEGRADATION DESIRED IN THE PRODUCT, AND HOLDING THIS TEMPERATURE UNTIL THE DESIRED PRODUCT RESULTS; AND THEN COOLING THE PRODUCT UNDER CONTINUED VACUUM.
Claim 2
Dependent Claim
103 words
PROCESS FOR PRODUCING STARCH CONVERSION PRODUCTS WHICH COMPRISES PLACING A POWDERY MASS OF FINELY DIVIDED STARCH IN A CONTAINER AND, WHILE CONTINOUSLY STIRRING THE MASS IN/THE CONTAINER: FORMING A VACUUM THEREIN, THEN INTRODUCING HYDROGEN CHLORIDE GAS TO ACIDIFY THE MASS; THEN HEATING THE MASS UNDER CONTINUED VACUUM AT TEMPERATURES BELOW 130*C. AND THUS DEHYDRATING IT UNTIL ITS MOISTURE CONTENT IS BELOW 1%: THEN UNDER CONTINUED VACUUM INCREASING THE HEATING TEMPERATURE TO ONE BETWEEN 130* AND 180*C., DEPENDING UPON THE DEGREE OF DEGRADATION DESIRED IN THE PRODUCT, AND HOLDING THIS TEMPERATURE UNTIL THE DESIRED PRODUCT RESULTS; AND THEN COOLING THE PRODUCT UNDER CONTINUED VACUUM.
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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) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |