US2739923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of citric acid by submerged fermentation
Assignee: National Research Council Canada
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Filing: 1952-08-11
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Granted: 1956-03-27
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Expires: 1972-08-11
Abstract
No abstract record available.
Inventors
- 👤 Stanley M Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:48
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
158 words
A PROCESS FOR THE PRODUCTION OF CITRIC ACID BY SUBMERGED FERMENTATION COMPRISING PREPARING A SEED MASH BY DILUTING MOLASSES WITH WATER ADJUSTING THE PH TO 5-8, TREATING WITH A WATER SOLUBLE FERROCYANIDE WITH HEAT, AND COOLING; PREPARING AN INOCULUM BY INOCULATING THE SEED MASH WITH SPORES OF A CITRIC ACID PRODUCING AND ACCUMULATING ORGANISM AND ALLOWING TO INCUBATE WITH AGITATION IN THE PRESENCE OF AIR TO EFFECT A PRIMARY GROWTH OF THE ORGANISM AT LEAST UNTIL THE SPORES HAVE GERMINATED; PREPARING A MAIN MASH BY DILUTING MOLASSES, ADJUSTING THE PH TO 6-9, TREATING WITH A WATER SOLUBLE FERROCYANIDE WITH HEAT, AND COOLING; ADDING AT LEAST A PORTION OF SAID INOCULUM TO THE MAIN MASH; DISPERSING AIR THROUGHOUT THE MAIN MASH TO EFFECT A SECONDARY GROWTH OF THE ORGANISM UNTIL SUITABLE FOR CITRIC ACID PRODUCING AND ACCUMULATING FERMENTATION; AND THEN DISPERSING OXYGEN THROUGHOUT THE MAIN MASH WHEREBY GROWTH IS RETARDED AND CITRIC ACID PRODUCING AND ACCUMULATING FERMENTATION IS OBTAINED.
Claim 2
Dependent Claim
158 words
A PROCESS FOR THE PRODUCTION OF CITRIC ACID BY SUBMERGED FERMENTATION COMPRISING PREPARING A SEED MASH BY DILUTING MOLASSES WITH WATER ADJUSTING THE PH TO 5-8, TREATING WITH A WATER SOLUBLE FERROCYANIDE WITH HEAT, AND COOLING; PREPARING AN INOCULUM BY INOCULATING THE SEED MASH WITH SPORES OF A CITRIC ACID PRODUCING AND ACCUMULATING ORGANISM AND ALLOWING TO INCUBATE WITH AGITATION IN THE PRESENCE OF AIR TO EFFECT A PRIMARY GROWTH OF THE ORGANISM AT LEAST UNTIL THE SPORES HAVE GERMINATED; PREPARING A MAIN MASH BY DILUTING MOLASSES, ADJUSTING THE PH TO 6-9, TREATING WITH A WATER SOLUBLE FERROCYANIDE WITH HEAT, AND COOLING; ADDING AT LEAST A PORTION OF SAID INOCULUM TO THE MAIN MASH; DISPERSING AIR THROUGHOUT THE MAIN MASH TO EFFECT A SECONDARY GROWTH OF THE ORGANISM UNTIL SUITABLE FOR CITRIC ACID PRODUCING AND ACCUMULATING FERMENTATION; AND THEN DISPERSING OXYGEN THROUGHOUT THE MAIN MASH WHEREBY GROWTH IS RETARDED AND CITRIC ACID PRODUCING AND ACCUMULATING FERMENTATION IS OBTAINED.
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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |