US3655658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7(alpha-amino-alpha-phenylacetamido)-cephalosporanate esters
Assignee: Leo Pharma AS
•
Filing: 1969-01-28
•
Granted: 1972-04-11
•
Expires: 1989-01-28
Abstract
Abstract THE INVENTION RELATES TO NEW CEPHALOSPORANIC ACID ESTERS OF THE FORMULA 2-(R-OCO-CH2-OOC-),3-(H3C-OCO-CH2-),7-(C6H5-CH(-NH2)-CO- NH-)-2-CEPHEM AND THEIR SALTS WITH NON-TOXIC, PHARMACEUTICALLY ACCEPTABLE ACIDS, R IS SAID FORMULA REPRESENTING HYDROGEN, AN ALKYL GROUP, A CYCLOALKYL GROUP, A CYCLOALKYL-ALKYL GROUP, OR AN ARALKYL GROUP TO METHODS OF PRODUCING THE SAID COMPOUNDS, AND TO PHARMACEUTICAL PREPARATION CONTAINING THE SAID COMPOUNDS AS ACTIVE INGREDIENTS.
Inventors
- 👤 Wagn Ole Godtfredsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:09
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/02; C07D501/04; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/54; A61K31/542; A61K31/545; C07D501/14; C07D501/16; C07D501/18; C07D501/20; C07D501/24; C07D501/26; C07D501/28; C07D501/32; F; F23; F23J; F23J13/00; F23J13/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |