US2770366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse flow cleanable aquarium filter
Assignee: Individual
•
Filing: 1951-10-02
•
Granted: 1956-11-13
•
Expires: 1971-10-02
Abstract
No abstract record available.
Inventors
- 👤 Stanley J Puzarowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:28
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01K63/045
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1055082A
Cited
GB189323210A
Cited
US2049530A
Cited
US2265741A
Cited
US2293051A
Cited
US2665250A
Cited
US2614529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |