Patent US1923649A successfully refreshed from Google Patents.
Patent US4241912A successfully refreshed from Google Patents.
Patent US2548771A successfully refreshed from Google Patents.
US2548771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic separator
Assignee: Individual
•
Filing: 1946-10-31
•
Granted: 1951-04-10
•
Expires: 1966-10-31
Abstract
No abstract record available.
Inventors
- 👤 Carpenter James Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:32
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/02; B03C7/06
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) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |