US2453345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Akzo Nobel UK PLC
•
Filing: 1945-06-28
•
Granted: 1948-11-09
•
Expires: 1965-06-28
Abstract
No abstract record available.
Inventors
- 👤 Stuart B Row
- 👤 Edward L Wooley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:11
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/38; B01D24/02; B01D24/10; B01D24/12; B01D24/46; B01D24/4631; B01D24/4636
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |