Patent US2535555A successfully refreshed from Google Patents.
US3050445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized trypsin solution
Assignee: Armour Pharmaceutical Co
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Filing: 1958-08-13
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Granted: 1962-08-21
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Expires: 1978-08-13
Abstract
No abstract record available.
Inventors
- 👤 Charles W Damaskus
- 👤 Paul E Bradford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:47
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A SUBSTANTIALLY STABILIZED AQUEOUS SOLUTION OF TRYPSIN CHARACTERIZED BY CONTAINING FROM ABOUT 0.5% TO ABOUT 20% BY WEIGHT OF A SULFHUDRYL AND DISULFIDE FREE AMINO ACID AND FROM ABOUT 0.3% TO ABOUT 5.0% BY WEIGHT OF A WATER-SOLUBLE NON-TOXIC CALCIUM SALT, SAID SOLUTION HAVING A PH OF FROM ABOUT 3.5 TO ABOUT 7.2 AND HAVING A CONCENTRATION OF TRYPSIN OF FROM ABOUT 5000 A.U. TO ABOUT 25,000 A.U. PER CC. OF WATER.
Claim 2
Dependent Claim
72 words
A SUBSTANTIALLY STABILIZED AQUEOUS SOLUTION OF TRYPSIN CHARACTERIZED BY CONTAINING FROM ABOUT 0.5% TO ABOUT 20% BY WEIGHT OF A SULFHUDRYL AND DISULFIDE FREE AMINO ACID AND FROM ABOUT 0.3% TO ABOUT 5.0% BY WEIGHT OF A WATER-SOLUBLE NON-TOXIC CALCIUM SALT, SAID SOLUTION HAVING A PH OF FROM ABOUT 3.5 TO ABOUT 7.2 AND HAVING A CONCENTRATION OF TRYPSIN OF FROM ABOUT 5000 A.U. TO ABOUT 25,000 A.U. PER CC. OF WATER.
References Cited (Backward Citations)
US2978384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |