US2454033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter
Assignee: Individual
•
Filing: 1944-08-12
•
Granted: 1948-11-16
•
Expires: 1964-08-12
Abstract
No abstract record available.
Inventors
- 👤 Southwick W Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:13
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR597003A
Cited
US730485A
Cited
US1453310A
Cited
FR608587A
Cited
US1800625A
Cited
US2133004A
Cited
US2110009A
Cited
US2190305A
Cited
US2325399A
Cited
US2339703A
Cited
US2345848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |