US3687833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of lactogen
Assignee: Pharmacia and Upjohn Co
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Filing: 1969-03-10
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Granted: 1972-08-29
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Expires: 1989-03-10
Abstract
Abstract HUMAN PLACENTAL LACTOGEN (ALSO KNOWN AS HPL) IS PURIFIED BY (1) WATER-MISCIBLE ORGANIC SOLVENT FRACTIONATION AND (2) ELECTROPHORESIS IN POLYACRYLAMIDE GEL USING A DISCONTINUOUS BUFFER SYSTEM. A MORE POTENT PRODUCT IS OBTAINED AS DETERMINED BY IMMUNOLOGICAL AND BIOLOGICAL CRITERIA.
Inventors
- 👤 Alan Parcells
- 👤 Donald A Dahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:49
CPC Classifications
A; A61; A61K; A61K38/00; A61K38/16; A61K38/17; A61K38/22; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/85; Y10S530/851; Y10S530/854
Claims Analysis
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |