Patent US1689277A successfully refreshed from Google Patents.
US1689277A
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US
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Cleaner for filtering elements
Assignee: FOIST KAY
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Filing: 1927-09-24
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Granted: 1928-10-30
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Expires: 1947-09-24
Abstract
No abstract record available.
Inventors
- 👤 Burns Charles St Clair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:23
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/62; B01D29/64; B01D29/6407; B01D29/6415; B01D29/6423; B01D29/643; B01D29/6469; B01D29/6476; B01D29/6484; B01D29/6492; B01D2201/00; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-10-30 | 1932-04-30 | 1932-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-30 | 1936-04-30 | 1936-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-30 | 1940-04-30 | 1940-10-30 | $7700.00 | Window Closed / Lapsed |