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US3089828A
Expired / Lapsed
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Evaluation of proteolytic enzyme activity
Assignee: SCHWARZ BIORES Inc
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Filing: 1960-12-27
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Granted: 1963-05-14
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 Andrew G Tsuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:02
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/68; C12Q1/34; C12Q1/37; C12Q1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
METHOD FOR EVALUATING PROTEOLYTIC ENZYME ACTIVITY WHICH COMPRISES MAINTAINING A SOLID BODY OF CROSS-LINKED THIOLATED GELATIN IN A LIQUID SOLUTION OF THE PROTEOLYTIC ENZYME TO BE EVALUATED, AND MEASURING THE CHANGE IN THE PHYSICAL DIMENSIONS OF SAID BODY AS A FUNCTION OF TIME SAID THIOLATED GELATIN HAVING A SUFFICIENT DEGREE OF CROSSLINKING WITH DISULFIDE BONDS TO RENDER THE SAME INSOLUBLE IN SAID LIQUID SOLUTION OF THE ENZYME.
Claim 2
Dependent Claim
67 words
METHOD FOR EVALUATING PROTEOLYTIC ENZYME ACTIVITY WHICH COMPRISES MAINTAINING A SOLID BODY OF CROSS-LINKED THIOLATED GELATIN IN A LIQUID SOLUTION OF THE PROTEOLYTIC ENZYME TO BE EVALUATED, AND MEASURING THE CHANGE IN THE PHYSICAL DIMENSIONS OF SAID BODY AS A FUNCTION OF TIME SAID THIOLATED GELATIN HAVING A SUFFICIENT DEGREE OF CROSSLINKING WITH DISULFIDE BONDS TO RENDER THE SAME INSOLUBLE IN SAID LIQUID SOLUTION OF THE ENZYME.
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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |