US3268523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of cephalosporanic acid
Assignee: R&L Molecular Research Ltd
•
Filing: 1965-06-28
•
Granted: 1966-08-23
•
Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Raap Rintje
- 👤 Lemieux Raymond Urgel
- 👤 Micetich Ronald George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:37
CPC Classifications
C; C07; C07D; C07D275/00; C07D275/02; C07D275/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US3218318A
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 |