Patent US3483984A successfully refreshed from Google Patents.
US3483984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for removing impurities from fluids
Assignee: Individual
•
Filing: 1967-03-06
•
Granted: 1969-12-16
•
Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 Carl Wolkenhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:01
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/005; B01D21/00; B01D21/0012; B01D35/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2413375A
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 |