US2910409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of citric acid
Assignee: Stauffer Chemical Co
•
Filing: 1956-12-14
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Granted: 1959-10-27
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Expires: 1976-12-14
Abstract
No abstract record available.
Inventors
- 👤 John H Fried
- 👤 Joseph G Sandza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:06
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P7/44; C12P7/48; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/913; Y10S435/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A PROCESS FOR PRODUCING CITRIC ACID BY SUBMERGED FERMENTATION WHEREIN A MOLASSES-CONTAINING MASH IS INOCULATED WITH A CITRIC ACID PRODUCING ORGANISM AND PERMITTED TO FERMENT, THE IMPROVEMENT COMPRISING: ADJUSTING THE PH OF SAID MASH TO BETWEEN ABOUT 4.3 AND 6.2; PERMITTING FERMENTATION TO PROCEED UNTIL A MYCELIAL FELT VOLUME BASED UPON TOTAL MASH VOLUME OF BETWEEN ABOUT 0.5 AND 5.0 PERCENT IS FORMED WITHOUT SEPARATION OF THE COMPONENTS OF THE MASH; ADDING TO SAID MASH SO FORMED SUFFICIENT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACIDS AND THE ACID SALTS TO REDUCE THE PH OF SAID MASH AT LEAST ABOUT 0.1 PH UNIT TO A PH OF NO LESS THAN ABOUT 3.3 WHEREBY TO INDUCE THE FORMATION OF FINE SPHERICAL MYCELIAL PELLETS AND ENCOURAGE CITRIC ACID PRODUCTION; AND THEREAFTER PERMITTING FURTHER FERMENTATION UNDER THE CONDITIONS OF REDUCED PH SO PRODUCED.
Claim 2
Dependent Claim
143 words
IN A PROCESS FOR PRODUCING CITRIC ACID BY SUBMERGED FERMENTATION WHEREIN A MOLASSES-CONTAINING MASH IS INOCULATED WITH A CITRIC ACID PRODUCING ORGANISM AND PERMITTED TO FERMENT, THE IMPROVEMENT COMPRISING: ADJUSTING THE PH OF SAID MASH TO BETWEEN ABOUT 4.3 AND 6.2; PERMITTING FERMENTATION TO PROCEED UNTIL A MYCELIAL FELT VOLUME BASED UPON TOTAL MASH VOLUME OF BETWEEN ABOUT 0.5 AND 5.0 PERCENT IS FORMED WITHOUT SEPARATION OF THE COMPONENTS OF THE MASH; ADDING TO SAID MASH SO FORMED SUFFICIENT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACIDS AND THE ACID SALTS TO REDUCE THE PH OF SAID MASH AT LEAST ABOUT 0.1 PH UNIT TO A PH OF NO LESS THAN ABOUT 3.3 WHEREBY TO INDUCE THE FORMATION OF FINE SPHERICAL MYCELIAL PELLETS AND ENCOURAGE CITRIC ACID PRODUCTION; AND THEREAFTER PERMITTING FURTHER FERMENTATION UNDER THE CONDITIONS OF REDUCED PH SO PRODUCED.
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) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |