Patent US2772990A successfully refreshed from Google Patents.
US2772990A
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Corn-starch process involving vortical classification
Assignee: Stamicarbon BV
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Filing: 1952-08-26
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Granted: 1956-12-04
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Expires: 1972-08-26
Abstract
No abstract record available.
Inventors
- 👤 Pieter W Hage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:02
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/04; C08B30/042; C08B30/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN THE WET MILLING PROCESS OF MANUFACTURING CORN STARCH WHEREIN A MILL STREAM CONTAINING PROCESS WATER, STARCH, BRAN, GLUTEN AND CELL CONGLOMERATES IS PRODUCED, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF VORTICALLY SEPARATING SAID MILL STREAM INTO TWO FRACTIONS, THE FIRST OF SAID FRACTIONS CONTAINING THE BULK OF THE COARSE CELL CONGLOMERATES EXCEEDING A SIZE WITHIN THE RANGE OF FROM 100 TO 200 MICRONS, AND THE SECOND OF SAID FRACTIONS CONTAINING THE BULK OF THE PROCESS WATER, STARCH, BRAN, GLUTEN AND FINE CELL CONGLOMERATES, GRINDING SAID FIRST FRACTION, RECYCLING THE GROUND FIRST FRACTION WITH FRESH FEED TO THE VORTICAL SEPARATION STEP, SCREENING SAID SECOND FRACTION TO REMOVE COARSE BRAN EXCEEDING A SIZE WITHIN THE RANGE OF FROM 100 TO 200 MICRONS THEREFROM, AND THEN SEPARATING THE FINAL STARCH PRODUCT FROM SAID SECOND FRACTION.
Claim 2
Dependent Claim
133 words
IN THE WET MILLING PROCESS OF MANUFACTURING CORN STARCH WHEREIN A MILL STREAM CONTAINING PROCESS WATER, STARCH, BRAN, GLUTEN AND CELL CONGLOMERATES IS PRODUCED, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF VORTICALLY SEPARATING SAID MILL STREAM INTO TWO FRACTIONS, THE FIRST OF SAID FRACTIONS CONTAINING THE BULK OF THE COARSE CELL CONGLOMERATES EXCEEDING A SIZE WITHIN THE RANGE OF FROM 100 TO 200 MICRONS, AND THE SECOND OF SAID FRACTIONS CONTAINING THE BULK OF THE PROCESS WATER, STARCH, BRAN, GLUTEN AND FINE CELL CONGLOMERATES, GRINDING SAID FIRST FRACTION, RECYCLING THE GROUND FIRST FRACTION WITH FRESH FEED TO THE VORTICAL SEPARATION STEP, SCREENING SAID SECOND FRACTION TO REMOVE COARSE BRAN EXCEEDING A SIZE WITHIN THE RANGE OF FROM 100 TO 200 MICRONS THEREFROM, AND THEN SEPARATING THE FINAL STARCH PRODUCT FROM SAID SECOND FRACTION.
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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |