Patent US3262250A successfully refreshed from Google Patents.
US3262250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collector cell for electrostatic precipitator
Assignee: American Air Filter Co Inc
•
Filing: 1963-08-29
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Granted: 1966-07-26
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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 12:02
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735509A
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US3127258A
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US1992974A
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US2579440A
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US2565458A
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US2650672A
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US2535697A
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US2822057A
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US2868319A
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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 |