US3856937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for isolation of antibiotic av290
Assignee: Wyeth Holdings LLC
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Filing: 1973-04-27
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Granted: 1974-12-24
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Expires: 1993-04-27
Abstract
Abstract This disclosure describes a reversible complex of antibiotic AV290 with an alkali metal alkyl sulfate and a process for preparing same. The complex is useful as an animal feed supplement which significantly enhances the growth rate of animals and poultry.
Inventors
- 👤 J Waite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:00
CPC Classifications
A; A61; A61K; A61K36/00; A61K36/06; A23; A23K; A23K20/00; A23K20/10; A23K20/195; A23K50/00; A23K50/30; A23K50/60; A23K50/70; A23K50/75; C; C07; C07G; C07G11/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A PROCESS OF RECOVERING AN ANTIBIOTIC AV 290-ALKYL SULFATE COMPLEX FROM A FERMENTATION WHOLE HARVEST MASH CONTAINING ANTIBIOTIC AV290 WHICH COMPRISES THE STEPS OF: A. PRODUCING A FERMENTIATION LIQUOR BY FILTERING THE WHOLE HARVEST MASH; B. ACIDIFYING THE FERMENTATION LIQUOR TO A PH OF FROM 1.9 TO 2.1 WITH A PHARMACOLOGICALLY ACCEPTABLE ACID; C. ADDING TO THE ACIDIFIED LIQUID A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
72 words
A PROCESS OF RECOVERING AN ANTIBIOTIC AV 290-ALKYL SULFATE COMPLEX FROM A FERMENTATION WHOLE HARVEST MASH CONTAINING ANTIBIOTIC AV290 WHICH COMPRISES THE STEPS OF: A. PRODUCING A FERMENTIATION LIQUOR BY FILTERING THE WHOLE HARVEST MASH; B. ACIDIFYING THE FERMENTATION LIQUOR TO A PH OF FROM 1.9 TO 2.1 WITH A PHARMACOLOGICALLY ACCEPTABLE ACID; C. ADDING TO THE ACIDIFIED LIQUID A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein the complexing agent is sodium decyl sulfate.
Claim 4
Dependent Claim
14 words
A process according to claim 1 wherein the complexing agent is sodium lauryl sulfate.
Claim 5
Dependent Claim
21 words
A process according to claim 1 wherein the complexing agent is a mixture of sodium cetyl sulfate and sodium oleyl sulfate.
Claim 6
Dependent Claim
15 words
A dry antibiotic AV290-alkyl sulfate complex prepared in accordance with the process of claim 1.
References Cited (Backward Citations)
US3338786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |