Patent EP0057076A1 successfully refreshed from Google Patents.
Patent US6784634B2 successfully refreshed from Google Patents.
US2417291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating tar acids from tar
Assignee: Reilly Tar and Chemical Corp
•
Filing: 1943-07-19
•
Granted: 1947-03-11
•
Expires: 1963-07-19
Abstract
No abstract record available.
Inventors
- 👤 Francis E Cislak
- 👤 Carney Thomas Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:34
CPC Classifications
C; C10; C10C; C10C1/00; C10C1/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2035868A
Cited
US2081692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-10 | 1950-09-09 | 1951-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-10 | 1954-09-09 | 1955-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-10 | 1958-09-09 | 1959-03-11 | $7700.00 | Window Closed / Lapsed |