Patent US2779693A successfully refreshed from Google Patents.
US2779693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of starch
Assignee: Textile Res Inst
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Filing: 1952-03-07
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Granted: 1957-01-29
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Expires: 1972-03-07
Abstract
No abstract record available.
Inventors
- 👤 Pacsu Eugene
- 👤 Albert W Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:26
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE METHOD OF OBTAINING THE A-FRACTION OF STARCH WHICH COMPRISES THE STEPS OF DISSOLVING STARCH IN AN ALKALI HYDROXIDE SOLUTION HAVING A PH VALUE OF FROM 13 TO 14, BUFFERING THE SOLUTION TO A PH VALUE OF BELOW 11, HEATING THE SOLUTION TO A TEMPERATURE OF FROM 60* TO 95*C., THEREAFTER COOLING THE SOLUTION AND PRECIPITATING THE A-FRACTION THEREFROM WITH AN ORGANIC POLAR AGENT WHICH WILL FORM AN INSOLUBLE COMPLEX WITH THE A-FRACTION, AND REMOVING THE PRECIPITATE FROM THE SOLUTION.
Claim 2
Independent Claim
80 words
THE METHOD OF OBTAINING THE A-FRACTION OF STARCH WHICH COMPRISES THE STEPS OF DISSOLVING STARCH IN AN ALKALI HYDROXIDE SOLUTION HAVING A PH VALUE OF FROM 13 TO 14, BUFFERING THE SOLUTION TO A PH VALUE OF BELOW 11, HEATING THE SOLUTION TO A TEMPERATURE OF FROM 60* TO 95*C., THEREAFTER COOLING THE SOLUTION AND PRECIPITATING THE A-FRACTION THEREFROM WITH AN ORGANIC POLAR AGENT WHICH WILL FORM AN INSOLUBLE COMPLEX WITH THE A-FRACTION, AND REMOVING THE PRECIPITATE FROM THE SOLUTION.
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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |