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US3654081A Expired / Lapsed US ⏱️ 0.0 years remaining

Starch liquefaction process

Assignee: Bayer Corp
•
Filing: 1970-06-01
•
Granted: 1972-04-04
•
Expires: 1990-06-01
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Abstract

Abstract A PROCESS IS DISCLOSED BT WHICH STARCH CAN BE EASILY AND COMPLETELY LIQUEFIED BY ADDING CALCIUM SALTS OR CALCIUM AND SODIUM SALTS TO AN AQUEOUS STARCH SLURRY WHICH ALSO PREFERABLY CONTAINS SOME ALPH-AMYLASE, PASSING THE SLURRY MIXTURE THROUGH A STEAM JET AT A TEMPERATURE OF ABOUT 121*C. TO 177*C., FLASH-COOLING THE HOT MIXTURE TO ABOUT 93*C TO 102*C., ADDING SOME ALPH-AMYLASE, MAINTAINING THE MIXTURE AT THIS TEMPERATURE FOR ABOUT 1060 MINUTES, COOLING THE MIXTURE TO ABOUT 85*C., ADDING SOME ALPHA-AMYLASE AND MAINTAINING THE RESULTING MIXTURE AT THIS TEMPERATURE UNTIL THE MIXTURE REACHES A DEXTROSE EQUIVALENT VALUE OF ABOUT 9 TO 30. WHEN CRUDE STARCH IS EMPLOYED, THE INSOLUBLES CAN BE EASILY SEPARATED FROM THE LIQUEFIED STARCH BY FILTRATION PRIOR TO ANY SUBSEQUENT TREATMENT OF THE LIQURFIED STARCH.

Inventors

  • 👤 Richard Vernon Vance
  • 👤 Arthur Orville Rock
  • 👤 Paul Walter Carr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 20:21
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/14; C08; C08B; C08B30/00; C08B30/12; Y; Y10; Y10S; Y10S435/00; Y10S435/813

Claims Analysis

Total Claims: 0
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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) 1975-04-04 1975-10-04 1976-04-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-04-04 1979-10-04 1980-04-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-04-04 1983-10-04 1984-04-04 $7700.00 Window Closed / Lapsed

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