US2659986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drying human serum albumin and other heat sensitive biologically active proteins
Assignee: Bayer Corp
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Filing: 1951-12-12
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Granted: 1953-11-24
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Expires: 1971-12-12
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Hink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:03
CPC Classifications
A; A61; A61K; A61K38/00; A61K38/16; A61K38/17; A61K38/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE METHOD OF DEHYDRATING WET SERUM ALBUMIN AND OTHER HEAT SENSITIVE BIOLOGICALLY ACTIVE PROTEINS COMPRISING: FREEZING SAID PRECIPITATE AND MECHANICALLY FORMING DISCRETE PARTICLES THEREOF; INTRODUCING SAID FROZEN PARTICLES INTO A BODY OF COLD, HIGHLY VOLATILE, WATER-MISCIBLE, ORGANIC LIQUID INERT WITH RESPECT TO SAID PROTEIN: RAPIDLY STIRRING SAID PARTICLES IN SAID LIQUID SO AS QUICKLY AND UNIFORMLY TO DISPERSE THEREIN WATER MELTING FROM THE ICE CONTENT OF SAID PARTICLES AND CONTINUING SAID STIRRING UNTIL ALL OF SAID ICE CONTENT HAS BEEN MELTED; AND FINALLY MECHANICALLY SEPARATING THE ICE-FREE PROTEIN PRECIPITATE PARTICLES FROM THE RESULTING LIQUID MIXTURE.
Claim 2
Independent Claim
95 words
THE METHOD OF DEHYDRATING WET SERUM ALBUMIN AND OTHER HEAT SENSITIVE BIOLOGICALLY ACTIVE PROTEINS COMPRISING: FREEZING SAID PRECIPITATE AND MECHANICALLY FORMING DISCRETE PARTICLES THEREOF; INTRODUCING SAID FROZEN PARTICLES INTO A BODY OF COLD, HIGHLY VOLATILE, WATER-MISCIBLE, ORGANIC LIQUID INERT WITH RESPECT TO SAID PROTEIN: RAPIDLY STIRRING SAID PARTICLES IN SAID LIQUID SO AS QUICKLY AND UNIFORMLY TO DISPERSE THEREIN WATER MELTING FROM THE ICE CONTENT OF SAID PARTICLES AND CONTINUING SAID STIRRING UNTIL ALL OF SAID ICE CONTENT HAS BEEN MELTED; AND FINALLY MECHANICALLY SEPARATING THE ICE-FREE PROTEIN PRECIPITATE PARTICLES FROM THE RESULTING LIQUID MIXTURE.
References Cited (Backward Citations)
USRE20969E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |