Patent US5389106A successfully refreshed from Google Patents.
US3249513A
Expired / Lapsed
US
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Purification of urease
Assignee: Warner Lambert Co LLC
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Filing: 1963-09-19
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Granted: 1966-05-03
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Babson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/78; C12N9/80; B; B01; B01D; B01D61/00; B01D61/24; B01D61/243; B01D71/00; B01D71/06; B01D71/08; B01D71/10; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10S435/814
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR THE SEPARATION OF UREASE FROM LEGUMINOUS MATERIAL WHICH CONSISTS ESSENTIALLY OF COMMINUTING THE LEGUMINOUS MATERIAL TO FORM A MEAL, SLURRYING THE MEAL IN WATER WITH AGITATION WHILE MAINTAINING THE PH OF THE AQUEOUS SLURRY AT ABOUT PH 7.0, SEPARATING THE SOLID PHASE FROM THE AQUEOUS PHASE AND DIALYZING THE AQUEOUS PHASE THROUGH A CELLULOSE MEMBRANE AGAINST A DILUTE AQUEOUS BUFFER SOLUTION MAINTAINED AT A PH OF ABOUT 7.5.
Claim 2
Dependent Claim
71 words
A PROCESS FOR THE SEPARATION OF UREASE FROM LEGUMINOUS MATERIAL WHICH CONSISTS ESSENTIALLY OF COMMINUTING THE LEGUMINOUS MATERIAL TO FORM A MEAL, SLURRYING THE MEAL IN WATER WITH AGITATION WHILE MAINTAINING THE PH OF THE AQUEOUS SLURRY AT ABOUT PH 7.0, SEPARATING THE SOLID PHASE FROM THE AQUEOUS PHASE AND DIALYZING THE AQUEOUS PHASE THROUGH A CELLULOSE MEMBRANE AGAINST A DILUTE AQUEOUS BUFFER SOLUTION MAINTAINED AT A PH OF ABOUT 7.5.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |