US2484277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector and sludge separator
Assignee: Whiting Corp
•
Filing: 1944-10-25
•
Granted: 1949-10-11
•
Expires: 1964-10-25
Abstract
No abstract record available.
Inventors
- 👤 Ernest F Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:48
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/10; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US604844A
Cited
US1793620A
Cited
US1434301A
Cited
US1501416A
Cited
US1743554A
Cited
US2171574A
Cited
US2337983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |