US3268513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 6-(alpha-amino-acylamino-acylamino)-penicillanic acids
Assignee: Wyeth LLC
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Filing: 1964-03-20
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Granted: 1966-08-23
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Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Norman H Grant
- 👤 Harvey E Alburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE PROCESS FOR PRODUCING 6-(A-AMINO-ACYLAMINOACYLAMINO)-PENICILLANIC ACIDS WHICH COMPRISES REACTING, IN AN AQUEOUS ACIDIC MEDIUM AT A PH OF FROM ABOUT 3.8 TO ABOUT 7.4 AND AT A TEMPERATURE FROM JUST ABOVE THE FREEZING POINT OF SAID AQUEOUS ACIDIC MEDIUM TO ABOUT 70*C. THE FOLLOWING: (1) A 6-(A-AMINO-ACYLAMINO)-PENICLLANIC ACID OF THE FORMULA: FIG-01 WHEREIN A IS A RADICAL HAVING A FORMULA OF THE GROUP CONSISTING OF THE FOLLOWING:
Claim 2
Dependent Claim
67 words
THE PROCESS FOR PRODUCING 6-(A-AMINO-ACYLAMINOACYLAMINO)-PENICILLANIC ACIDS WHICH COMPRISES REACTING, IN AN AQUEOUS ACIDIC MEDIUM AT A PH OF FROM ABOUT 3.8 TO ABOUT 7.4 AND AT A TEMPERATURE FROM JUST ABOVE THE FREEZING POINT OF SAID AQUEOUS ACIDIC MEDIUM TO ABOUT 70*C. THE FOLLOWING: (1) A 6-(A-AMINO-ACYLAMINO)-PENICLLANIC ACID OF THE FORMULA: FIG-01 WHEREIN A IS A RADICAL HAVING A FORMULA OF THE GROUP CONSISTING OF THE FOLLOWING:
References Cited (Backward Citations)
US3206455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |