US2884413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthophosphate esters of starch
Assignee: Unilever Bestfoods North America
•
Filing: 1956-04-06
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Granted: 1959-04-28
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Expires: 1976-04-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Kerr
- 👤 Jr Frank C Cleveland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:03
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/06; C08B31/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR MAKING STARCH ORTHOPHOSPHATE ESTERS WHICH COMPRISES HEATING A STARCH PRODUCT CONTAINING NOT MORE THAN ABOUT 20 PERCENT OF MOISTURE IN CONTACT WITH ABOUT 0.5 TO ABOUT 10 PERCENT, BASED ON THE DRY WEIGHT OF THE STARCH PRODUCT, OF AN ALKALI METAL INORGANIC PHOSPHATE SALT AT A TEMPERATURE BETWEEN ABOUT 100* C. AND ABOUT 160* C. FOR A TIME TO EFFECT THE DESIRED DEGREE OF ESTERIFICATION; SAID HEATING BEING CARRIED OUT WHILE PERMITTING EVAPORATION OF WATER; THE PH DURING THE HEAT TREATMENT BEING WITHIN THE RANGE OF 4 TO 11.5; SAID PHOSPHATE SALT BEING FROM THE GROUP CONSISTING OF METAPHOSPHATES, POLYMETAPHOSPHATES, PYROPHOSPHATES, TRIPOLYPHOSPHATES AND MIXTURES THEREOF.
Claim 2
Dependent Claim
108 words
A PROCESS FOR MAKING STARCH ORTHOPHOSPHATE ESTERS WHICH COMPRISES HEATING A STARCH PRODUCT CONTAINING NOT MORE THAN ABOUT 20 PERCENT OF MOISTURE IN CONTACT WITH ABOUT 0.5 TO ABOUT 10 PERCENT, BASED ON THE DRY WEIGHT OF THE STARCH PRODUCT, OF AN ALKALI METAL INORGANIC PHOSPHATE SALT AT A TEMPERATURE BETWEEN ABOUT 100* C. AND ABOUT 160* C. FOR A TIME TO EFFECT THE DESIRED DEGREE OF ESTERIFICATION; SAID HEATING BEING CARRIED OUT WHILE PERMITTING EVAPORATION OF WATER; THE PH DURING THE HEAT TREATMENT BEING WITHIN THE RANGE OF 4 TO 11.5; SAID PHOSPHATE SALT BEING FROM THE GROUP CONSISTING OF METAPHOSPHATES, POLYMETAPHOSPHATES, PYROPHOSPHATES, TRIPOLYPHOSPHATES AND MIXTURES THEREOF.
References Cited (Backward Citations)
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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 |