US2510748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cold swelling starch-aldehyde compositions
Assignee: Scholtens Chemische Fabrieken NV
•
Filing: 1946-11-01
•
Granted: 1950-06-06
•
Expires: 1966-11-01
Abstract
No abstract record available.
Inventors
- 👤 Lolkema Jan
- 👤 Meer Willem Albertus Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/003; C08B30/00; C08B30/12; C08B30/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS OF MANUFACTURING COLD SWELLING STARCH PREPARATIONS, THE SOLUTIONS OF WHICH WHEN DRIED WILL PRODUCE WATER RESISTANT LAYERS, COMPRISING ADDING TO A STARCH PRODUCT A LIMITED QUANTITY OF WATER AND AT LEAST 10% OF AN ALDEHYDE CALCULATED ON THE WEIGHT OF THE DRY STARCH PRODUCT, ADJUSTING THE MIXTURE TO A PH OF AT LEAST 5 AND HEATING THE SAME ON A ROTATING CYLINDER TO A TEMPERATURE ABOVE THE GELATINIZING POINT OF STARCH BUT NOT EXCEEDING 140*C., WHILE PRESSING THE MASS UNDER MECHANICAL PRESSURE TO FORM A THIN LAYER WHICH IS SIMULTANEOUSLY DRIED AND SUBSEQUENTLY COMMINUTED.
Claim 2
Dependent Claim
96 words
A PROCESS OF MANUFACTURING COLD SWELLING STARCH PREPARATIONS, THE SOLUTIONS OF WHICH WHEN DRIED WILL PRODUCE WATER RESISTANT LAYERS, COMPRISING ADDING TO A STARCH PRODUCT A LIMITED QUANTITY OF WATER AND AT LEAST 10% OF AN ALDEHYDE CALCULATED ON THE WEIGHT OF THE DRY STARCH PRODUCT, ADJUSTING THE MIXTURE TO A PH OF AT LEAST 5 AND HEATING THE SAME ON A ROTATING CYLINDER TO A TEMPERATURE ABOVE THE GELATINIZING POINT OF STARCH BUT NOT EXCEEDING 140*C., WHILE PRESSING THE MASS UNDER MECHANICAL PRESSURE TO FORM A THIN LAYER WHICH IS SIMULTANEOUSLY DRIED AND SUBSEQUENTLY COMMINUTED.
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) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |