US4091116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjusting the proportion of a substance by enzyme treatment
Assignee: Individual
•
Filing: 1976-11-08
•
Granted: 1978-05-23
•
Expires: 1996-11-08
Abstract
Abstract The proportion of a compound such as lactose in a solution or suspension such as milk using a soluble enzyme such as beta-galactosidase is carried out by removing matter larger than the enzyme in the solution or suspension by filtering with a first filter to produce a filtrate containing the compound, enzymatically converting the compound present in the filtrate, filtering off the enzyme with a second filter and recombining the resultant filtrate with the matter filtered off by the first filter.
Inventors
- 👤 Ronald Alexander Nixon Edwards
- 👤 Peter Morris Cantrell
- 👤 John James Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:34
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/70; A23L2/84; A23C; A23C9/00; A23C9/12; A23C9/1203; A23C9/1206; A23C9/14; A23C9/142; A23C9/1422; B; B01; B01D; B01D61/00; B01D61/14; B01D61/145; B01D61/18; A23C2210/00; A23C2210/20; A23C2210/206; B01D2313/00; B01D2313/22; B01D2313/221; Y; Y10; Y10S; Y10S435/00; Y10S435/803
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
137 words
A process for reducing the proportion of lactose in a composition selected from the group consisting of milk and milk derived solutions using the soluble enzyme β-galactosidase comprising the steps of filtering in a first filter by ultrafiltration from said composition substantially all matter having a molecular size larger than the enzyme including fat, casein micelles, and whey protein as present in the milk or milk derived solutions, adding the enzyme to the filtrate obtained from the first filter, maintaining the enzyme in contact with the first filtrate for a time sufficient to allow the enzyme to hydrolyse the lactose to a predetermined extent, filtering by ultafiltration the enzyme from the hydrolysed first filtrate in a second filter to produce a second filtrate and recombining the second filtrate with the matter filtered out by the first filter.
Claim 2
Dependent Claim
137 words
A process for reducing the proportion of lactose in a composition selected from the group consisting of milk and milk derived solutions using the soluble enzyme β-galactosidase comprising the steps of filtering in a first filter by ultrafiltration from said composition substantially all matter having a molecular size larger than the enzyme including fat, casein micelles, and whey protein as present in the milk or milk derived solutions, adding the enzyme to the filtrate obtained from the first filter, maintaining the enzyme in contact with the first filtrate for a time sufficient to allow the enzyme to hydrolyse the lactose to a predetermined extent, filtering by ultafiltration the enzyme from the hydrolysed first filtrate in a second filter to produce a second filtrate and recombining the second filtrate with the matter filtered out by the first filter.
Claim 3
Dependent Claim
28 words
A process as claimed in claim 1 in which the enzyme filtered out by the second filter is recycled for addition to fresh filtrate from the first filter.
References Cited (Backward Citations)
US3753725A
Cited
US3896241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |