US3365449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7-(substituted thioacylamino) cephalosporanic acid and derivatives thereof
Assignee: Astellas Pharma Inc
•
Filing: 1965-07-20
•
Granted: 1968-01-23
•
Expires: 1985-07-20
Abstract
No abstract record available.
Inventors
- 👤 Takano Tadayoshi
- 👤 Hattori Kiyoshi
- 👤 Nakanishi Kazuo
- 👤 Miura Kazuko
- 👤 Umio Suminori
- 👤 Kishimoto Teiji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:08
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/54; A61K31/542; A61K31/545; C07D501/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US3218318A
Cited
US3261832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |