US2818135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust laden air separator
Assignee: Individual
•
Filing: 1954-08-16
•
Granted: 1957-12-31
•
Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur W White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:16
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/024; B01D47/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US886009A
Cited
US1069335A
Cited
US1050866A
Cited
GB191212007A
Cited
GB191514806A
Cited
US1793620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |