US2134114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and method of operation
Assignee: Individual
•
Filing: 1935-12-26
•
Granted: 1938-10-25
•
Expires: 1955-12-26
Abstract
No abstract record available.
Inventors
- 👤 Roy D Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:47
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/46; B01D24/4668; B01D24/4689; B01D24/002; B01D24/005; B01D24/02; B01D24/10; B01D24/18; B01D24/183; B01D24/4631; B01D2201/00; B01D2201/20; B01D2201/204; B01D2201/30; B01D2201/301; B01D2201/306
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-10-24 | 1942-04-25 | 1942-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-24 | 1946-04-25 | 1946-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-24 | 1950-04-25 | 1950-10-25 | $7700.00 | Window Closed / Lapsed |