US2889933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hold-down assemblies for filter cartridges
Assignee: INDIANA COMMERICAL FILTERS COR
•
Filing: 1955-10-03
•
Granted: 1959-06-09
•
Expires: 1975-10-03
Abstract
No abstract record available.
Inventors
- 👤 Alan D Brundage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:47
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/52; B01D29/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1906565A
Cited
US2218800A
Cited
US2271054A
Cited
US2454033A
Cited
US2543165A
Cited
US2578020A
Cited
US2568181A
Cited
US2680521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |