US2586766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purifying aureomycin by chromatographic adsorption
Assignee: Wyeth Holdings LLC
•
Filing: 1948-11-30
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Granted: 1952-02-19
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Expires: 1968-11-30
Abstract
No abstract record available.
Inventors
- 👤 Pidacks Charles
- 👤 Edward E Starbird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:04
CPC Classifications
C; C07; C07C; C07C233/00; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
IN THE PROCESS OF PURIFYING AUREOMYCIN, THE STEPS WHICH COMPRISE ADSORBING THE AUREOMYCIN FROM AN AQUEOUS SOLUTION CONTAINING AUREOMYCIN ONTO AN ABSORBENT AND ELUTING THE AUREOMYCIN WITH AN ACIDULATED ORGANIC SOLVENT, SELECTING THE FRACTION WHICH APPEARS YELLOW UNDER ULTRAVIOLET LIGHT, AND RECOVERING AUREOMYCIN THEREFROM.
Claim 2
Dependent Claim
44 words
IN THE PROCESS OF PURIFYING AUREOMYCIN, THE STEPS WHICH COMPRISE ADSORBING THE AUREOMYCIN FROM AN AQUEOUS SOLUTION CONTAINING AUREOMYCIN ONTO AN ABSORBENT AND ELUTING THE AUREOMYCIN WITH AN ACIDULATED ORGANIC SOLVENT, SELECTING THE FRACTION WHICH APPEARS YELLOW UNDER ULTRAVIOLET LIGHT, AND RECOVERING AUREOMYCIN THEREFROM.
References Cited (Backward Citations)
US2482055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |