Patent US3000873A successfully refreshed from Google Patents.
US3000873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antibiotic recovery process
Assignee: Merck and Co Inc
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Filing: 1957-05-21
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Granted: 1961-09-19
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Expires: 1977-05-21
Abstract
No abstract record available.
Inventors
- 👤 Frank J Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:02
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/06; C07H17/065; C07H17/075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN AN ION EXCHANGE PROCESS FOR THE RECOVERY OF NOVOBIOCIN FROM MIXTURES CONTAINING THE SAME WHEREIN THE NOVOBIOCIN IS ABSORBED ON A STRONGLY BASIC ANION EXCHANGE RESIN THE IMPROVEMENT WHICH COMPRISES ELUTING THE ADSORBED NOVOBIOCIN FROM THE RESIN WITH AN ACIDIC ELUTING SOLUTION CONSISTING OF AN AQUEOUS ORGANIC SOLVENT MIXTURE CONTAINING ABOUT 70 PERCENT TO ABOUT 98 PERCENT OF AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF LOWER ALIPHATIC ALCOHOLS AND LOWER ALIPHATIC KETONES AND AN ACID PRESENT IN THE SAID ACIDIC ELUTING SOLUTION IN A CONCENTRATION OF FROM ABOUT 1 WEIGHT/ VOLUME PERCENT TO ABOUT 10 WEIGHT/VOLUME PERCENT.
Claim 2
Dependent Claim
100 words
IN AN ION EXCHANGE PROCESS FOR THE RECOVERY OF NOVOBIOCIN FROM MIXTURES CONTAINING THE SAME WHEREIN THE NOVOBIOCIN IS ABSORBED ON A STRONGLY BASIC ANION EXCHANGE RESIN THE IMPROVEMENT WHICH COMPRISES ELUTING THE ADSORBED NOVOBIOCIN FROM THE RESIN WITH AN ACIDIC ELUTING SOLUTION CONSISTING OF AN AQUEOUS ORGANIC SOLVENT MIXTURE CONTAINING ABOUT 70 PERCENT TO ABOUT 98 PERCENT OF AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF LOWER ALIPHATIC ALCOHOLS AND LOWER ALIPHATIC KETONES AND AN ACID PRESENT IN THE SAID ACIDIC ELUTING SOLUTION IN A CONCENTRATION OF FROM ABOUT 1 WEIGHT/ VOLUME PERCENT TO ABOUT 10 WEIGHT/VOLUME PERCENT.
References Cited (Backward Citations)
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 |