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US1344215A
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Assignee: UNITED FILTERS Corp
•
Filing: 1913-07-02
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Granted: 1920-06-22
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Expires: 1933-07-02
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Sweetland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:52
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39; B01D29/41; B01D29/62; B01D29/64; B01D29/6438; B01D29/70; B01D29/74; B01D29/76; B01D29/80; B01D29/84; B01D2201/00; B01D2201/08; B01D2201/085
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) | 1923-06-22 | 1923-12-22 | 1924-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-06-22 | 1927-12-22 | 1928-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-06-22 | 1931-12-22 | 1932-06-22 | $7700.00 | Window Closed / Lapsed |