US2978447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of p-aminobenzyl penicillin and derivatives thereof
Assignee: University of Alberta
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Filing: 1960-07-11
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Granted: 1961-04-04
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Expires: 1980-07-11
Abstract
No abstract record available.
Inventors
- 👤 Anthony L Tosoni
- 👤 Peter J Moloney
- 👤 Goldsmith Louis
- 👤 Douglas G Glass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE PROCESS OF PRODUCING THE RELATIVELY HYDROPHILIC P-AMINOBENZYL PENICILLIN, WHICH COMPRISES SUBJECTING P-NITROBENZYL PENICILLIN SUBSTANTIALLY FREE FROM HYDROPHILIC CONTAMINANTS TO HYDROGENATION WITH HYDROGEN IN A LOWER ALKYL ESTER OF A LOWER ALKANOIC ACID AS A SOLVENT, IN THE PRESSENCE OF A CATALYST OF THE PLATINUM-METAL GROUP, AT A TEMPERATURE NOT SUBSTANTIALLY EXCEEDING 90*F., TO CONVERT THE NTIRO RADICAL OF SUCH PENICILLIN TO THE AMINO RADICAL, AND THEREBY FORMING P-AMINOBENZYL PENICILLIN.
Claim 2
Dependent Claim
70 words
THE PROCESS OF PRODUCING THE RELATIVELY HYDROPHILIC P-AMINOBENZYL PENICILLIN, WHICH COMPRISES SUBJECTING P-NITROBENZYL PENICILLIN SUBSTANTIALLY FREE FROM HYDROPHILIC CONTAMINANTS TO HYDROGENATION WITH HYDROGEN IN A LOWER ALKYL ESTER OF A LOWER ALKANOIC ACID AS A SOLVENT, IN THE PRESSENCE OF A CATALYST OF THE PLATINUM-METAL GROUP, AT A TEMPERATURE NOT SUBSTANTIALLY EXCEEDING 90*F., TO CONVERT THE NTIRO RADICAL OF SUCH PENICILLIN TO THE AMINO RADICAL, AND THEREBY FORMING P-AMINOBENZYL PENICILLIN.
References Cited (Backward Citations)
US2479296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |