US3206455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 6-(alpha-aminoacylamino)-penicillanic acids
Assignee: Wyeth LLC
•
Filing: 1963-02-07
•
Granted: 1965-09-14
•
Expires: 1983-02-07
Abstract
No abstract record available.
Inventors
- 👤 Harvey E Alburn
- 👤 Norman H Grant
- 👤 Rd Horace Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:43
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE PROCESS FOR PRODUCING 6-(A-AMINOACYLAMINO)PENICILLANIC ACID COMPOUNDS WHICH COMPRISED REACTING, IN AN AQUEOUS ACIDIC MEDIUM AT A PH OF FROM ABOUT 3.8 TO ABOUT 6.2, AT A TEMPERATURE FROM JUST ABOVE THE FREEZING POINT OF THE AQUEOUS MIXTURE TO ABOUT 37*C., AND IN THE ABSENCE OF ANY SUBSTANTIVE AMOUNT OF AN ORGANIC SOLVENT, 6-AMINOPENICILLANIC ACID WITH 2,5-OXAZOLIDINEDIONE HAVING THE FORMULA:
Claim 2
Dependent Claim
60 words
THE PROCESS FOR PRODUCING 6-(A-AMINOACYLAMINO)PENICILLANIC ACID COMPOUNDS WHICH COMPRISED REACTING, IN AN AQUEOUS ACIDIC MEDIUM AT A PH OF FROM ABOUT 3.8 TO ABOUT 6.2, AT A TEMPERATURE FROM JUST ABOVE THE FREEZING POINT OF THE AQUEOUS MIXTURE TO ABOUT 37*C., AND IN THE ABSENCE OF ANY SUBSTANTIVE AMOUNT OF AN ORGANIC SOLVENT, 6-AMINOPENICILLANIC ACID WITH 2,5-OXAZOLIDINEDIONE HAVING THE FORMULA:
References Cited (Backward Citations)
US3080356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |