US2418318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of bzi-chlorobenzanthrone
Assignee: Wyeth Holdings LLC
•
Filing: 1944-03-23
•
Granted: 1947-04-01
•
Expires: 1964-03-23
Abstract
No abstract record available.
Inventors
- 👤 Scalera Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:31
CPC Classifications
C; C09; C09B; C09B3/00; C09B3/02; C09B3/06; C09B3/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-31 | 1950-09-30 | 1951-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-31 | 1954-09-30 | 1955-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-31 | 1958-09-30 | 1959-04-01 | $7700.00 | Window Closed / Lapsed |