US2621798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clean-out mechanism for filters and the like
Assignee: Individual
•
Filing: 1951-07-13
•
Granted: 1952-12-16
•
Expires: 1971-07-13
Abstract
No abstract record available.
Inventors
- 👤 Aloysius C Kracklauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:02
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39; B01D29/41; B01D29/62; B01D29/64; B01D29/6407; B01D29/6415; B01D29/76; B01D29/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US424303A
Cited
US1967070A
Cited
US1438797A
Cited
US1685085A
Cited
US1686092A
Cited
US1964326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |