Patent US3499898A successfully refreshed from Google Patents.
US3499898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-aminophenyl and 2-aminopyridyl pyrimidines having an amino or amido group in the 5-position
Assignee: Evonik Operations GmbH
•
Filing: 1967-11-07
•
Granted: 1970-03-10
•
Expires: 1987-11-07
Abstract
No abstract record available.
Inventors
- 👤 Walter Von Bebenburg
- 👤 Kurt Thiele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:09
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48; C07D239/50
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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |