US3094527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the extraction of cephalosporin from an impure solution thereof
Assignee: Individual
•
Filing: 1958-07-11
•
Granted: 1963-06-18
•
Expires: 1978-07-11
Abstract
No abstract record available.
Inventors
- 👤 Florey Howard Walter
- 👤 Abraham Edward Penley
- 👤 Newton Guy Geoffrey Frederick
- 👤 Burton Henry Stowar
- 👤 Kelly Brendan Kevin
- 👤 Hale Clifford William
- 👤 Miller George Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:26
CPC Classifications
C; C07; C07D; C07D499/00; C07D499/04; C07D499/18; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/8215; Y10S435/911; Y10S435/925; Y10S435/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR THE EXTRACTION OF CEPHALOSPORIN N FROM A SOLUTION THEREOF WHICH COMPRISES ADSORPTIVELY CONTACTING SAID SOLUTION WITH CHARCOAL AT A PH ABOVE 4 BUT BELOW 7, ELUTING ADSORBED CEPHALOSPORIN N FROM THE CHARCOAL WITH A SELECTIVE ELUANT THEREFOR, CONTACTING SAID CEPHALOSPORIN N IN AQUEOUS SOLUTION WITH AN ANION EXCHANGE RESIN AND ELUTING CEPHALOSPORIN N FROM SAID RESIN WITH A DILUTE ACID.
Claim 2
Dependent Claim
63 words
A PROCESS FOR THE EXTRACTION OF CEPHALOSPORIN N FROM A SOLUTION THEREOF WHICH COMPRISES ADSORPTIVELY CONTACTING SAID SOLUTION WITH CHARCOAL AT A PH ABOVE 4 BUT BELOW 7, ELUTING ADSORBED CEPHALOSPORIN N FROM THE CHARCOAL WITH A SELECTIVE ELUANT THEREFOR, CONTACTING SAID CEPHALOSPORIN N IN AQUEOUS SOLUTION WITH AN ANION EXCHANGE RESIN AND ELUTING CEPHALOSPORIN N FROM SAID RESIN WITH A DILUTE ACID.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |