US4302539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel single cell protein substrate
Assignee: Chevron USA Inc
•
Filing: 1980-06-30
•
Granted: 1981-11-24
•
Expires: 2000-06-30
Abstract
Abstract An acetone-insoluble organic acid product from the nitric oxidation of lignite is useful in growing single cell protein.
Inventors
- 👤 J. Gustav Schulz
- 👤 Pamela M. Bunting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:54
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/20; C12N1/14; C12N1/16; Y; Y10; Y10S; Y10S435/00; Y10S435/804; Y10S435/8215; Y10S435/822; Y10S435/874; Y10S435/911; Y10S435/921
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
In the process for manufacture of single cell protein comprising bacteria and fungus by growing a microorganism on fossil fuel carbon source the improvement which comprises using as the carbon source an oxidation-nitration product of lignite which is manufactured by subjecting a slurry of lignite in aqueous nitric acid to a temperature of from about 15° C. to about 200° C. for about 0.5 to about 15 hours, separating the solids, extracting the resulting solids with acetone, recovering the acetone-insoluble fraction, and dissolving the acetone-insoluble solid in base and neutralizing the solution to between pH 6.5 and pH 8.0.
Claim 2
Dependent Claim
99 words
In the process for manufacture of single cell protein comprising bacteria and fungus by growing a microorganism on fossil fuel carbon source the improvement which comprises using as the carbon source an oxidation-nitration product of lignite which is manufactured by subjecting a slurry of lignite in aqueous nitric acid to a temperature of from about 15° C. to about 200° C. for about 0.5 to about 15 hours, separating the solids, extracting the resulting solids with acetone, recovering the acetone-insoluble fraction, and dissolving the acetone-insoluble solid in base and neutralizing the solution to between pH 6.5 and pH 8.0.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein Pseudomonas single cell protein is manufactured.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein Candida single cell protein is manufactured.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein Candida tropicalis single cell protein is manufactured.
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) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |