US2787334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic dust separators
Assignee: Individual
•
Filing: 1955-06-22
•
Granted: 1957-04-02
•
Expires: 1975-06-22
Abstract
No abstract record available.
Inventors
- 👤 Linderoth Erik Torvald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:54
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/36; B03C3/361; B03C3/363; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B03C3/366; Y; Y10; Y10S; Y10S55/00; Y10S55/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |