US2446786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical current pneumatic separator
Assignee: VACUUM CONCENTRATOR Inc
•
Filing: 1944-09-23
•
Granted: 1948-08-10
•
Expires: 1964-09-23
Abstract
No abstract record available.
Inventors
- 👤 Melvin W Redhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:55
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US38258A
Cited
US219420A
Cited
US884551A
Cited
US1522151A
Cited
US1799010A
Cited
US1845358A
Cited
US2233432A
Cited
US2099505A
Cited
US2236548A
Cited
US2153270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |