US3404513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile electrostatic precipitator
Assignee: Research Cottrell Inc
•
Filing: 1965-02-01
•
Granted: 1968-10-08
•
Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:14
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1357466A
Cited
US1944976A
Cited
US1982470A
Cited
US2049561A
Cited
US2440455A
Cited
US2756842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |