Patent US4464469A successfully refreshed from Google Patents.
US4464469A
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Stabilized lactase solutions and processes for stabilization
Assignee: JOHN and E STURGE Ltd
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Filing: 1982-08-31
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Granted: 1984-08-07
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Expires: 2002-08-31
Abstract
Abstract The invention is concerned with the use of sorbitol to stabilize aqueous solutions of yeast lactases. The sorbitol is conveniently used in high concentration so as to act not only as a stabilizing agent but also as an antimicrobial agent. If desired, an antimicrobial agent other than sorbitol can be incorporated. Both aqueous solutions of yeast lactases containing sorbitol and processes for stabilizing aqueous solutions of yeast lactases by incorporation of sorbitol are claimed.
Inventors
- 👤 Stephen R. Parr
- 👤 Geoffrey M. Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:45
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12N9/2468; C12N9/2471; C12N9/78; C12N9/86; C12N9/96; C12Y; C12Y302/00; C12Y302/01; C12Y302/01023; C12Y302/01108; C12Y305/00; C12Y305/02; C12Y305/02006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
An aqueous solution of a yeast lactase containing, as stabilizing agent, a stabilizing effective amount of sorbitol.
Claim 2
Dependent Claim
17 words
An aqueous solution of a yeast lactase containing, as stabilizing agent, a stabilizing effective amount of sorbitol.
Claim 3
Dependent Claim
17 words
An aqueous solution as claimed in claim 1 which contains at least 10% by weight of sorbitol.
Claim 4
Dependent Claim
21 words
An aqueous solution as claimed in claim 1 or claim 2 which contains from 10 to 80% by weight of sorbitol.
Claim 5
Dependent Claim
18 words
An aqueous solution as claimed in claim 3 which contains from 50 to 70% by weight of sorbitol.
Claim 6
Dependent Claim
21 words
An aqueous composition as claimed in claim 1 which contains an amount of sorbitol which is effective as an antimicrobial agent.
Claim 7
Dependent Claim
16 words
An aqueous composition as claimed in claim 1 which contains an antimicrobial agent other than sorbitol.
Claim 8
Dependent Claim
24 words
A process for stabilizing an aqueous solution of a yeast lactase which comprises incorporating therein, as stabilizing agent, a stabilizing effective amount of sorbitol.
Claim 9
Dependent Claim
24 words
A process for stabilizing an aqueous solution of a yeast lactase which comprises incorporating therein, as stabilizing agent, a stabilizing effective amount of sorbitol.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |