Patent US3930944A successfully refreshed from Google Patents.
US3930944A
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Urokinase production
Assignee: Abbott Laboratories
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Filing: 1975-03-31
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Granted: 1976-01-06
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Expires: 1995-03-31
Abstract
Abstract The addition of specified amounts of pronase to the production medium for urokinase using live cells increases the production of urokinase by 50 - 100%.
Inventors
- 👤 Evelyn Carmon Nicol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:08
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/48; C12N9/50; C12N9/64; C12N9/6421; C12N9/6424; C12N9/6456; C12N9/6462; C12Y; C12Y304/00; C12Y304/21; C12Y304/21073; A; A61; A61K; A61K38/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
41 words
The process of producing urokinase from a contiguous culture of live kidney cells in an aqueous nutrient medium containing, in addition to the usual cell culture maintenance additives, between 6 and 50 μg. of pronase per 100 milliliters of said nutrient.
Claim 2
Dependent Claim
41 words
The process of producing urokinase from a contiguous culture of live kidney cells in an aqueous nutrient medium containing, in addition to the usual cell culture maintenance additives, between 6 and 50 μg. of pronase per 100 milliliters of said nutrient.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said pronase is used in an amount of between 6 and 20 μg.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |