US2555211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making lactose
Assignee: M & R Dietetic Lab Inc
•
Filing: 1947-06-20
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Granted: 1951-05-29
•
Expires: 1967-06-20
Abstract
No abstract record available.
Inventors
- 👤 Alexander E Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
C; C13; C13K; C13K5/00; A; A23; A23C; A23C9/00; A23C9/14; A23C9/146; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN THE METHOD OF RECOVERING LACTOSE IN A CRYSTALLINE FORM OF HIGH PURITY FROM WHEY HAVING A PH NO LOWER THAN ABOUT 5.8, COMPRISING CONTACTING THE SAID WHEY WITH A CATIONIC EXCHANGER MATERIAL ACTING IN THE MIXED ALKALI METAL-HYDROGEN CYCLE, TO EFFECT REPLACEMENT OF CALCIUM AND MAGNESIUM IONS IN SAID WHEY WITH CATIONS IN SAID EXCHANGER MATERIAL, THEREBY CHANGING THOSE SALTS IN THE WHEY CHARACTERIZED BY LOW SOLUBILITY IN WATER TO SALTS AND/OR ACIDS HAVING HIGH SOLUBILITY IN WATER, AND TO EFFECT AN ADJUSTMENT OF THE PH OF THE WHEY SO THAT IT FALLS WITHIN THE APPROXIMATE RANGE OF 4.0 TO 4.7, HEATING THE RESULTING TREATED WHEY TO COAGULATE PROTEINS THEREIN AND SEPARATING THE COAGULATED PROTEINS FROM THE WHEY LIQUID.
Claim 2
Dependent Claim
120 words
IN THE METHOD OF RECOVERING LACTOSE IN A CRYSTALLINE FORM OF HIGH PURITY FROM WHEY HAVING A PH NO LOWER THAN ABOUT 5.8, COMPRISING CONTACTING THE SAID WHEY WITH A CATIONIC EXCHANGER MATERIAL ACTING IN THE MIXED ALKALI METAL-HYDROGEN CYCLE, TO EFFECT REPLACEMENT OF CALCIUM AND MAGNESIUM IONS IN SAID WHEY WITH CATIONS IN SAID EXCHANGER MATERIAL, THEREBY CHANGING THOSE SALTS IN THE WHEY CHARACTERIZED BY LOW SOLUBILITY IN WATER TO SALTS AND/OR ACIDS HAVING HIGH SOLUBILITY IN WATER, AND TO EFFECT AN ADJUSTMENT OF THE PH OF THE WHEY SO THAT IT FALLS WITHIN THE APPROXIMATE RANGE OF 4.0 TO 4.7, HEATING THE RESULTING TREATED WHEY TO COAGULATE PROTEINS THEREIN AND SEPARATING THE COAGULATED PROTEINS FROM THE WHEY LIQUID.
References Cited (Backward Citations)
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US2155318A
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US2145109A
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GB542846A
Cited
US2319649A
Cited
US2365221A
Cited
US2477558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |