US3816174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a lactulose syrup
Assignee: Morinaga Milk Industry Co Ltd
•
Filing: 1972-05-17
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Granted: 1974-06-11
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Expires: 1992-05-17
Abstract
Abstract A lactulose syrup containing more than 80 percent lactulose in total solid content, is produced in an industrially acceptable manner by admixing an aqueous solution of lactose with an aqueous solution of sodium hydroxide containing less than 0.54 percent sodium hydroxide based on the quantity of lactose, heating said mixed solution to a temperature of above 70*C. to isomerize the lactose, and thereafter concentrating lactulose from the reaction liquid.
Inventors
- 👤 T Nagasawa
- 👤 T Obayashi
- 👤 T Mizota
- 👤 M Tomita
- 👤 Y Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
C; C13; C13K; C13K13/00; C13K13/005; A; A23; A23L; A23L27/00; A23L27/30; A23L27/33; A23L29/00; A23L29/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
The process of claim 1, wherein the sodium hydroxide solution used has a concentration of 2 to 10 percent, by weight.
Claim 2
Dependent Claim
21 words
The process of claim 1, wherein the resulting lactulose solution is concentrated by separation of unreacted lactose from the reaction mixture.
Claim 3
Dependent Claim
16 words
The process of claim 3, wherein the separation of said lactose is effected by selective crystallization.
References Cited (Backward Citations)
US3546206A
Cited
US3514327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |