Patent US3067845A successfully refreshed from Google Patents.
US3499533A
Expired / Lapsed
US
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Automatically cleaned,pivotable,filter assembly
Assignee: American National Bank and Trust Co
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Filing: 1968-11-19
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Granted: 1970-03-10
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Expires: 1988-11-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin B Lopker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:38
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/04; B01D29/00; B01D29/01; B01D29/62; B01D29/70; B01D35/00; B01D35/16; B01D35/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3397787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |