US2479141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular horizontal current gravity liquid classifier
Assignee: EIDP Inc
•
Filing: 1945-06-29
•
Granted: 1949-08-16
•
Expires: 1965-06-29
Abstract
No abstract record available.
Inventors
- 👤 Frank E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:21
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/36; B03B5/42; B03B11/00; B03B2011/004
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US873951A
Cited
US1167638A
Cited
US1186677A
Cited
US1198404A
Cited
GB400094A
Cited
US2209618A
Cited
US2150946A
Cited
US2176107A
Cited
US2228014A
Cited
US2365734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |