US2818357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing transformation products of high molecular carbohydrates
Assignee: Henkel AG and Co KGaA
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Filing: 1953-07-10
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Granted: 1957-12-31
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Expires: 1973-07-10
Abstract
No abstract record available.
Inventors
- 👤 Ziegler Carl
- 👤 Kohler Rudolf
- 👤 Ruggeberg Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:51
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/12; C08B30/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A PROCESS FOR DEXTRINIZING STARCH, THE STEPS COMPRISING MOISTENING STARCH WITH A DILUTE AQUEOUS SOLUTION OF A MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID AND NITRIC ACID, DRYING SAID ACID-TREATED STARCH TO FORM A POURABLE STARCH POWDER, PASSING SAID STARCH POWDER THROUGH A SPIRAL TUBE CONVEYOR WHILE HEATING BY INDIRECT HEAT EXCHANGE AT A TEMPERATURE BETWEEN ABOUT 120*C. AND ABOUT 200*C., EFFECTING MOVEMENT OF SAID STARCH TO BE DEXTRINIZED THROUGH SAID SPIRAL TUBE CONVEYOR BY VIBRATING SAID CONVEYOR, SAID VIBRATIONS HAVING A FREQUENCY OF ABOUT 1250 PER MINUTE AND AN AMPLITUDE OF ABOUT 2-4 MM, AND DISCHARGING THE RESULTING DEXTRINIZED STARCH AS SOON AS THE DESIRED DEGREE OF DEXTRINIZATION IS ACHIEVED.
Claim 2
Dependent Claim
115 words
IN A PROCESS FOR DEXTRINIZING STARCH, THE STEPS COMPRISING MOISTENING STARCH WITH A DILUTE AQUEOUS SOLUTION OF A MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID AND NITRIC ACID, DRYING SAID ACID-TREATED STARCH TO FORM A POURABLE STARCH POWDER, PASSING SAID STARCH POWDER THROUGH A SPIRAL TUBE CONVEYOR WHILE HEATING BY INDIRECT HEAT EXCHANGE AT A TEMPERATURE BETWEEN ABOUT 120*C. AND ABOUT 200*C., EFFECTING MOVEMENT OF SAID STARCH TO BE DEXTRINIZED THROUGH SAID SPIRAL TUBE CONVEYOR BY VIBRATING SAID CONVEYOR, SAID VIBRATIONS HAVING A FREQUENCY OF ABOUT 1250 PER MINUTE AND AN AMPLITUDE OF ABOUT 2-4 MM, AND DISCHARGING THE RESULTING DEXTRINIZED STARCH AS SOON AS THE DESIRED DEGREE OF DEXTRINIZATION IS ACHIEVED.
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |