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Patent US4467034A successfully refreshed from Google Patents.
US4467034A
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Process for the production of D-lactic acid with the use of Lactobacillus bulgaricus DSM 2129
Assignee: Hoechst AG
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Filing: 1982-08-09
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Granted: 1984-08-21
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Expires: 2002-08-09
Abstract
Abstract D-lactic acid is obtained by fermentation of a nutritive medium containing glucose and/or lactose and other usual additives by means of Lactobacillus bulgaricus DSM 2129.
Inventors
- 👤 Hartmut Voelskow
- 👤 Dieter Sukatsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:29
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/20; C12N1/205; C12P; C12P7/00; C12P7/40; C12P7/56; C12R; C12R2001/00; C12R2001/01; C12R2001/225; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/853
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
23 words
A process for producing D-lactic acid which comprises anaerobically fermenting a nutritive medium comprising glucose, lactose, or both, with Lactobacillus bulgaricus DSM 2129.
Claim 2
Dependent Claim
23 words
A process for producing D-lactic acid which comprises anaerobically fermenting a nutritive medium comprising glucose, lactose, or both, with Lactobacillus bulgaricus DSM 2129.
Claim 3
Dependent Claim
20 words
The process as claimed in claim 1, wherein whey or a suspension of whey powder is used as nutritive medium.
Claim 4
Dependent Claim
15 words
The process as claimed in claim 2, wherein glucose is added to the nutritive medium.
Claim 5
Dependent Claim
21 words
The process as claimed in claim 1, wherein the fermentation is carried out at temperatures of from 30° to 50° C.
Claim 6
Dependent Claim
19 words
The process as claimed in claim 1, wherein the fermentation is carried out at 40° C. to 45° C.
Claim 7
Dependent Claim
20 words
The process as claimed in claim 1, wherein the fermentation is carried out at a pH from 4.5 to 7.
Claim 8
Dependent Claim
20 words
The process as claimed in claim 1, wherein the fermentation is carried out at a pH from 6.5 to 6.8.
Claim 9
Dependent Claim
16 words
The process as claimed in claim 1, wherein calcium carbonate is added to the nutritive medium.
Claim 10
Dependent Claim
18 words
The process as claimed in claim 1, wherein the operations are carried out under a protective gas atmosphere.
Claim 11
Dependent Claim
24 words
A biologically pure culture of Lactobacillus bulgaricus DSM 2129 capable of producing 115 grams of lactic acid per liter of medium within 48 hours.
Claim 12
Dependent Claim
24 words
A biologically pure culture of Lactobacillus bulgaricus DSM 2129 capable of producing 115 grams of lactic acid per liter of medium within 48 hours.
References Cited (Backward Citations)
US3988440A
Cited
US4156019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |