US2335749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rake and cleaner for filter beds
Assignee: Individual
•
Filing: 1939-07-22
•
Granted: 1943-11-30
•
Expires: 1959-07-22
Abstract
No abstract record available.
Inventors
- 👤 Charles E Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:05
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/205; B01D24/46; B01D24/4605; B01D24/461; B01D24/4631; B01D24/4636; B01D24/4668; B01D24/4673; B01D24/48; B01D24/4869; B01D35/00; B01D35/16
Claims Analysis
Total Claims: 0
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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) | 1946-11-29 | 1947-05-31 | 1947-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-29 | 1951-05-31 | 1951-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-29 | 1955-05-31 | 1955-11-30 | $7700.00 | Window Closed / Lapsed |