Patent US2433726A successfully refreshed from Google Patents.
US2433726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for contacting fluids with subdivided solids
Assignee: Universal Oil Products Co
•
Filing: 1943-11-29
•
Granted: 1947-12-30
•
Expires: 1963-11-29
Abstract
No abstract record available.
Inventors
- 👤 Charles H Angell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:59
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1380067A
Cited
US1601938A
Cited
US1845058A
Cited
DE533037C
Cited
US2046816A
Cited
US1989406A
Cited
US2212583A
Cited
US2311564A
Cited
US2302209A
Cited
US2347682A
Cited
US2341193A
Cited
US2304128A
Cited
US2363874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |