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US3749671A Expired / Lapsed US ⏱️ 0.0 years remaining

Process of producing enzyme compositions

Assignee: Procter and Gamble Co
•
Filing: 1971-07-01
•
Granted: 1973-07-31
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Expires: 1991-07-01
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Abstract

Abstract PRILLS COMPRISING AN ENZYME AND A NORMALLY SOLID WATER-SOLUBLE TRANSLUCENT MATERIAL ARE MADE BY A PROCESS WHEREIN THE RESULTANT PRILLS HAVE A RELATIVELY LIGHT COLOR. A SLURRY OF THE ENZYME AND NORMALY SOLID WATER-SOLUBLE TRANSLUCENT MATERIAL IS INJECTED WITH AN INERT GAS AND THEN MADE INTO PRILLS BY AN PRILLING METHOD. AN ESPECIALLY PREFERRED METHOD OF MAKING THE PRILLS IS BY SPRAY COOLING. THE INERT GAS INJECTION STEP PRIOR TO PRILLING RESULTS IN PRILLS HAVING A HUNTER COLOR L-VALUE OF ABOUT L-70 TO L-90, SIGNIFICANTLY HIGHER THAN THE L-VALUE OF PRILLS MADE BY A PRILLING TECHNIQUE NOT EMPLOYING THE INERT GAS INJECTION STEP. EACH OF THE RESULTANT PRILLS IS IN THE FORM OF A SUBSTANTIALLY SPHERICAL SHAPE HAVING A SUBSTANTIALLY SMOOTH OUTER SURFACE AND POROUS INTERIOR.

Inventors

  • 👤 B Gedge

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 17:57
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38672; B; B01; B01J; B01J2/00; B01J2/02; B01J2/04; C08; C08J; C08J9/00; C08J9/30

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) 1976-07-30 1977-01-29 1977-07-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-07-30 1981-01-29 1981-07-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-07-30 1985-01-29 1985-07-31 $7700.00 Window Closed / Lapsed

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