Patent US3753725A successfully refreshed from Google Patents.
US3753725A
Expired / Lapsed
US
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Method for enzymatic conversion of lactose to glucose and galactose in lactose containing fluids
Assignee: Individual
•
Filing: 1971-03-11
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Granted: 1973-08-21
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Expires: 1991-03-11
Abstract
Abstract A process-fluid containing lactose, such as milk, flows through a first chamber that is juxtaposed to a second chamber and separated therefrom by a semi-permeable membrane. An enzymefluid, which is a fluid similar to the process-fluid but containing lactose, flows through the second chamber to convert the lactose in the fluids in the chambers to glucose and galactose at a rate dependent upon the tempera
Inventors
- 👤 R Williams
- 👤 Young M Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:31
CPC Classifications
A; A23; A23C; A23C9/00; A23C9/14; A23C9/142; A23C9/1427; A23C9/12; A23C9/1203; A23C9/1206; A23C2220/00; A23C2220/10; A23C2220/102
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
25 words
The invention of claim 1 wherein glucose and galactose produced in the second chamber are permitted to return through the membrane into the first chamber.
Claim 2
Dependent Claim
23 words
The invention of claim 1 including the recycling of the enzyme-fluid with the step of adding lactase enzyme to the enzyme-fluid as needed.
Claim 3
Dependent Claim
22 words
The invention of claim 1 including the passage of the process-fluid through a heater after removal of the lactose by the enzyme-fluid.
Claim 4
Dependent Claim
41 words
The invention of claim 1 wherein said chambers are concentrically arranged dialysis tubing whereby the lactose in the process-fluid in the first chamber is acted upon the lactase enzyme in the enzyme-fluid in the second chamber to produce glucose and galactose.
Claim 5
Dependent Claim
20 words
The invention of claim 5 including the step of controlling the level of the glucose and galactose in the process-fluid.
Claim 6
Dependent Claim
63 words
The invention of claim 5 including simultaneously passing a fluid similar to the process-fluid through a third chamber surrounding the second chamber and separated therefrom by semi-permeable membrane at a greater rate than the flow of process-fluid and enzyme-fluid in the dialysis tubing to constantly remove glucose and galactose from the process-fluid and thereby control the levels of such substances in the process-fluid.
Claim 7
Dependent Claim
21 words
The invention of claim 7 wherein the fluid in the third chamber is maintained at a constant temperature of approximately 42*C.
Claim 8
Independent Claim
92 words
A method of converting lactose in milk to glucose and galactose with a lactase enzyme not directly added to the milk comprising the steps of: a. passing the milk containing lactose through a first chamber; b. simultaneously passing a lactase enzyme-fluid through a juxtaposed second chamber separated from the first chamber by a semi-permeable membrane so that the lactase enzyme-fluid bathes the milk containing first chamber; and, c. permitting the lactose to pass through the membrane barrier while preventing the lactase from penetrating the membrane barrier due to its large molecular weight.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |