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US4952505A Expired / Lapsed US ⏱️ 0.0 years remaining

Fermentation of trichoderma reesei and apparatus therefor

Assignee: Florida State University
•
Filing: 1988-08-08
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Granted: 1990-08-28
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Expires: 2008-08-08
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Abstract

Abstract A process for producing enzyme cellulases by the fermentation of Trichoderma reesei in an aqueous nutrient medium containing assimilable sources of cellulose, nitrogen, phosphate, magnesium and iron in the presence of an oxygen containing atmosphere and a fermentation apparatus for the aerobic fermentation of microorganisms in a liquid medium at a pressure in excess of about 7 atmospheres. The method comprises fermenting the Trichoderma reesei at a temperature of between about 26° C. and 31° C. while maintaining the oxygen containing atmosphere at a pressure of about 1 atmosphere until the Trichoderma reesei enter the late stationary growth phase, thereafter, gradually and steadily increasing the pressure of the oxygen containing atmosphere until it is in excess of about 7 atmospheres and culturing the Trichoderma reesei at said increased pressure and at a temperature of between about 40° C. and about 60° C., thereby resulting in the production of enzyme cellulases by the Trichoderma reesei, and recovering the enzyme cellulases.

Inventors

  • 👤 Michael Y. Cho

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 11:48
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12N9/2405; C12N9/2434; C12N9/2437; C12N1/00; C12N1/14; C12N1/145; C12Y; C12Y302/00; C12Y302/01; C12Y302/01004; C12R; C12R2001/00; C12R2001/645; C12R2001/885; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/945

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 139 words
A process for producing enzyme cellulases by the fermentation of Trichoderma reesei (ATCC 26921) in an aqueous nutrient medium containing assimilable sources of cellulose, nitrogen, phosphate magnesium and iron in the presence of an oxygen containing atmosphere, the method comprising fermenting the Trichoderma reesei at a temperature of between about 26° C. and 31° C. while maintaining the oxygen containing atmosphere at a pressure of about 1 atmosphere until the Trichoderma reesei enter the late stationary growth phase, thereafter, gradually and steadily increasing the pressure of the oxygen containing atmosphere until it is in excess of about 7 atmospheres and fermenting the Trichoderma reesei at said increased pressure and at an increased temperature of between about 40° C. and about 60° C., thereby resulting in the production of enzyme cellulases by the Trichoderma reesei, and recovering the enzyme cellulases.
Claim 2
Dependent Claim 139 words
A process for producing enzyme cellulases by the fermentation of Trichoderma reesei (ATCC 26921) in an aqueous nutrient medium containing assimilable sources of cellulose, nitrogen, phosphate magnesium and iron in the presence of an oxygen containing atmosphere, the method comprising fermenting the Trichoderma reesei at a temperature of between about 26° C. and 31° C. while maintaining the oxygen containing atmosphere at a pressure of about 1 atmosphere until the Trichoderma reesei enter the late stationary growth phase, thereafter, gradually and steadily increasing the pressure of the oxygen containing atmosphere until it is in excess of about 7 atmospheres and fermenting the Trichoderma reesei at said increased pressure and at an increased temperature of between about 40° C. and about 60° C., thereby resulting in the production of enzyme cellulases by the Trichoderma reesei, and recovering the enzyme cellulases.
Claim 3
Dependent Claim 18 words
A process as set forth in claim 1 wherein said aqueous nutrient medium comprises a source of calcium.
Claim 4
Dependent Claim 22 words
A process as set forth in claim 1 wherein said aqueous nutrient medium comprises trace amounts of manganese, cobalt, zinc and molybdenum.
Claim 5
Dependent Claim 20 words
A process as set forth in claim 1 wherein said increased pressure is between about 117 and about 127 atmospheres.
Claim 6
Dependent Claim 16 words
A process as set forth in claim 1 wherein said increased temperature is about 45° C.
Claim 7
Dependent Claim 16 words
A process as set forth in claim 4 wherein said increased pressure is about 122 atmospheres.

References Cited (Backward Citations)

EP0133035A2 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-08-27 1994-02-26 1994-08-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-08-27 1998-02-26 1998-08-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-08-27 2002-02-26 2002-08-28 $7700.00 Window Closed / Lapsed

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