US1867397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: SF Bowser and Co Inc
•
Filing: 1931-01-19
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Granted: 1932-07-12
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Expires: 1951-01-19
Abstract
No abstract record available.
Inventors
- 👤 William F Brace
- 👤 Fernand E Beluche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:53
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; B01D29/00; B01D29/11; B01D29/31; B01D29/35; B01D29/39; B01D29/395; B01D29/50; B01D29/52; B01D29/88; B01D29/90; B01D35/14; B01D35/143
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) | 1935-07-12 | 1936-01-11 | 1936-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-07-12 | 1940-01-11 | 1940-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-07-12 | 1944-01-11 | 1944-07-12 | $7700.00 | Window Closed / Lapsed |