US3000792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antibiotic adsorption process
Assignee: Merck and Co Inc
•
Filing: 1957-05-21
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Granted: 1961-09-19
•
Expires: 1977-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert G Denkewalter
- 👤 Gillin James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:54
CPC Classifications
C; C12; C12P; C12P1/00; C12N; C12N1/00; C12R; C12R2001/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR RECOVERING NOVOBIOCIN FROM AN AERATED FERMENTATION BROTH WHICH COMPRISES ADDING TO SAID FERMENTATION BROTH A STRONGLY BASIC HIGHLY POROUS ANION EXCHANGE RESIN CAPABLE OF ADSORBING NOVOBIOCIN, ALLOWING THE FERMENTATION TO PROCEED IN THE PRESENCE OF THE RESIN FOR A MINIMUM PERIOD OF ABOUT 1 HOUR, SEPARATING SAID ION EXCHANGE RESIN, AND ELUTING FROM SAID ION EXCHANGE RESIN THE NOVOBIOCIN ADSORBED THEREON.
Claim 2
Dependent Claim
64 words
A PROCESS FOR RECOVERING NOVOBIOCIN FROM AN AERATED FERMENTATION BROTH WHICH COMPRISES ADDING TO SAID FERMENTATION BROTH A STRONGLY BASIC HIGHLY POROUS ANION EXCHANGE RESIN CAPABLE OF ADSORBING NOVOBIOCIN, ALLOWING THE FERMENTATION TO PROCEED IN THE PRESENCE OF THE RESIN FOR A MINIMUM PERIOD OF ABOUT 1 HOUR, SEPARATING SAID ION EXCHANGE RESIN, AND ELUTING FROM SAID ION EXCHANGE RESIN THE NOVOBIOCIN ADSORBED THEREON.
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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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |