US3488768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning ultrafilter
Assignee: Amicon Corp
•
Filing: 1968-02-08
•
Granted: 1970-01-06
•
Expires: 1988-02-08
Abstract
No abstract record available.
Inventors
- 👤 Peter N Rigopulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:40
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/4077; B; B01; B01D; B01D61/00; B01D61/14; B01D61/145; B01D63/00; B01D63/08; B01D63/087; B01D69/00; B01D69/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2854143A
Cited
US3400074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |