US2884412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate-modified starches and preparation
Assignee: International Minerals and Chemical Corp
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Filing: 1953-09-04
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Granted: 1959-04-28
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Expires: 1973-09-04
Abstract
No abstract record available.
Inventors
- 👤 Neukom Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:59
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/06; C08B31/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR THE PREPARATION OF A STARCH PHOSPHATE WHICH COMPRISES COMMINGLING UNGELATINIZED STARCH WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 2.5% BY WEIGHT OF AT LEAST ONE PHOSPHATE SALT OF AN ALKALI METAL AND HAVING A PH BETWEEN ABOUT 3.0 AND ABOUT 7.5, CONTACTING SAID STARCH AND SAID SOLUTION IN A PROPORTION AND FOR A TIME SUFFICIENT TO INCORPORATE SAID PHOSPATE SALT IN SAID STARCH IN A QUANTITY EQUIVALENT TO AT LEAST ABOUT 1.0% BY WEIGHT OF PHOSPHORUS, REMOVING UNABSORBED LIQUID FROM THE TREATED STARCH BY DRYING AT A TEMPERATURE BELOW THE POINT AT WHICH THE STARCH GELATINIZES, AND HEATING THE DRIED STARCH AT A TEMPERATURE BETWEEN ABOUT 120 AND ABOUT 175* C. FOR A PERIOD OF ABOUT 1 TO ABOUT 15 HOURS.
Claim 2
Dependent Claim
125 words
A PROCESS FOR THE PREPARATION OF A STARCH PHOSPHATE WHICH COMPRISES COMMINGLING UNGELATINIZED STARCH WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST ABOUT 2.5% BY WEIGHT OF AT LEAST ONE PHOSPHATE SALT OF AN ALKALI METAL AND HAVING A PH BETWEEN ABOUT 3.0 AND ABOUT 7.5, CONTACTING SAID STARCH AND SAID SOLUTION IN A PROPORTION AND FOR A TIME SUFFICIENT TO INCORPORATE SAID PHOSPATE SALT IN SAID STARCH IN A QUANTITY EQUIVALENT TO AT LEAST ABOUT 1.0% BY WEIGHT OF PHOSPHORUS, REMOVING UNABSORBED LIQUID FROM THE TREATED STARCH BY DRYING AT A TEMPERATURE BELOW THE POINT AT WHICH THE STARCH GELATINIZES, AND HEATING THE DRIED STARCH AT A TEMPERATURE BETWEEN ABOUT 120 AND ABOUT 175* C. FOR A PERIOD OF ABOUT 1 TO ABOUT 15 HOURS.
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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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |