US3483675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic cleaning filtering apparatus
Assignee: FLAKTAIR Inc
•
Filing: 1967-01-12
•
Granted: 1969-12-16
•
Expires: 1987-01-12
Abstract
No abstract record available.
Inventors
- 👤 James Frank King Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:01
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR687742A
Cited
US1878998A
Cited
US2315278A
Cited
US3000507A
Cited
GB1010337A
Cited
US3000663A
Cited
GB925874A
Cited
US3166391A
Cited
US3339348A
Cited
US3315446A
Cited
US3304571A
Cited
US3345805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |