US3262250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collector cell for electrostatic precipitator
Assignee: American Air Filter Co Inc
•
Filing: 1963-08-29
•
Granted: 1966-07-26
•
Expires: 1983-08-29
Abstract
No abstract record available.
Inventors
- 👤 Evans E Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:52
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/155
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2735509A
Cited
US3127258A
Cited
US1992974A
Cited
US2579440A
Cited
US2565458A
Cited
US2650672A
Cited
US2535697A
Cited
US2822057A
Cited
US2868319A
Cited
US2908348A
Cited
US3143403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |