US2590220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating materials in suspension in elastic fluid
Assignee: CH Wheeler Manufacturing Co
•
Filing: 1948-02-17
•
Granted: 1952-03-25
•
Expires: 1968-02-17
Abstract
No abstract record available.
Inventors
- 👤 Nicholas N Stephanoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:11
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/06; B02C19/063
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1305413A
Cited
US535099A
Cited
US857988A
Cited
US1367635A
Cited
US1883218A
Cited
US1861247A
Cited
US2044915A
Cited
US2032827A
Cited
US2219011A
Cited
US2155697A
Cited
US2111725A
Cited
US2237091A
Cited
US2191095A
Cited
US2325080A
Cited
US2315083A
Cited
US2351091A
Cited
US2484255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |