US896436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: BUTTERS PATENT VACUUM FILTER COMPANY Inc
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Filing: 1907-10-30
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Granted: 1908-08-18
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Expires: 1927-10-30
Abstract
No abstract record available.
Inventors
- 👤 Galen Howell Clevenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:51
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39
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) | 1911-08-18 | 1912-02-17 | 1912-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-08-18 | 1916-02-17 | 1916-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-08-18 | 1920-02-17 | 1920-08-18 | $7700.00 | Window Closed / Lapsed |