Patent EP0369707A2 successfully refreshed from Google Patents.
US3486741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller
Assignee: Individual
•
Filing: 1968-02-06
•
Granted: 1969-12-30
•
Expires: 1988-02-06
Abstract
No abstract record available.
Inventors
- 👤 Ernst L Midgette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:09
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0091; B; B01; B01F; B01F27/00; B01F27/05; B01F27/11; B01F27/111
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |