Patent US1640592A successfully refreshed from Google Patents.
Patent US3261832A successfully refreshed from Google Patents.
US3261832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for 7-aminocephalosporanic acid derivatives
Assignee: Glaxo Laboratories Ltd
•
Filing: 1964-07-09
•
Granted: 1966-07-19
•
Expires: 1984-07-09
Abstract
No abstract record available.
Inventors
- 👤 Cowley Brian Richard
- 👤 Gregory Gordon Ian
- 👤 Long Alan Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:01
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/36; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/54; A61K31/542; A61K31/545; C07D501/02; C07D501/04; C07D501/38; C07D501/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
IN A PROCESS FOR THE PREPARATION OF A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
12 words
IN A PROCESS FOR THE PREPARATION OF A COMPOUND OF THE FORMULA:
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |