Patent US2423309A successfully refreshed from Google Patents.
US2423309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing catalytic clay pellets
Assignee: Filtrol Corp
•
Filing: 1943-07-03
•
Granted: 1947-07-01
•
Expires: 1963-07-03
Abstract
No abstract record available.
Inventors
- 👤 Wright W Gary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:50
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US613267A
Cited
US916267A
Cited
US1623017A
Cited
US1673891A
Cited
US1759737A
Cited
US1979124A
Cited
US2024131A
Cited
US2119615A
Cited
US2150031A
Cited
US2139026A
Cited
US2330098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |