US2801007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual clarifier
Assignee: Stevens & Thompson
•
Filing: 1956-03-26
•
Granted: 1957-07-30
•
Expires: 1976-03-26
Abstract
No abstract record available.
Inventors
- 👤 Thompson Henry Loren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:58
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012; B01D21/10; B01D21/12; B01D21/14; B01D21/24; B01D21/2427
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |