US2802000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ungelatinized cold water soluble starch ethers
Assignee: NAT STARCH PRODUCTS Inc
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Filing: 1953-08-13
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Granted: 1957-08-06
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Expires: 1973-08-13
Abstract
No abstract record available.
Inventors
- 👤 Carlyle G Caldwell
- 👤 Martin Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:05
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD OF MAKING AN UNGELATINIZED, COLD WATER SOLUBLE STARCH ETHER WHICH CONSISTS, IN REACTING A MIXTURE OF STARCH, AN ETHERIFICATION REAGENT, A BASE AND WATER, THE BASE BEING PRESENT IN THE FORM OF FINE PARTICLES OF AN AQUEOUS SOLUTION HAVING A CONCENTRATION OF FROM 10% TO 80%, THE WATER BEING PRESENT IN AN AMOUNT LESS THAN THAT WHICH WILL PERMIT SUSPENSION OF THE STARCH AND IN AN AMOUNT TO MAKE A BASE SOLUTION OF SAID CONCENTRATION, THE BASE BEING IN AN AMOUNT FROM 0.5% UP CALCULATED AS DRY WEIGHT OF THE BASE UPON THE DRY WEIGHT OF THE STARCH THE SAID BASE FUNCTIONING TO SWELL BUT NOT TO GELATINIZE THE STARCH GRANULES, AND THE ETHERIFICATION REAGENT BEING IN AN AMOUNT OF FROM 1% TO 62% BASED ON THE WEIGHT OF THE STARCH AND FUNCTIONING TO RENDER THE SWELLED BUT UNGELATINIZED STARCH GRANULES COLD WATER SOLUBLE.
Claim 2
Independent Claim
146 words
THE METHOD OF MAKING AN UNGELATINIZED, COLD WATER SOLUBLE STARCH ETHER WHICH CONSISTS, IN REACTING A MIXTURE OF STARCH, AN ETHERIFICATION REAGENT, A BASE AND WATER, THE BASE BEING PRESENT IN THE FORM OF FINE PARTICLES OF AN AQUEOUS SOLUTION HAVING A CONCENTRATION OF FROM 10% TO 80%, THE WATER BEING PRESENT IN AN AMOUNT LESS THAN THAT WHICH WILL PERMIT SUSPENSION OF THE STARCH AND IN AN AMOUNT TO MAKE A BASE SOLUTION OF SAID CONCENTRATION, THE BASE BEING IN AN AMOUNT FROM 0.5% UP CALCULATED AS DRY WEIGHT OF THE BASE UPON THE DRY WEIGHT OF THE STARCH THE SAID BASE FUNCTIONING TO SWELL BUT NOT TO GELATINIZE THE STARCH GRANULES, AND THE ETHERIFICATION REAGENT BEING IN AN AMOUNT OF FROM 1% TO 62% BASED ON THE WEIGHT OF THE STARCH AND FUNCTIONING TO RENDER THE SWELLED BUT UNGELATINIZED STARCH GRANULES COLD WATER SOLUBLE.
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) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |