Patent US806090A successfully refreshed from Google Patents.
US683061A
Expired / Lapsed
US
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Portable filtering apparatus.
Assignee: Individual
•
Filing: 1901-05-27
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Granted: 1901-09-24
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Expires: 1921-05-27
Abstract
No abstract record available.
Inventors
- 👤 Hermann Nordtmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:10
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/03
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) | 1904-09-23 | 1905-03-25 | 1905-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-09-23 | 1909-03-25 | 1909-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-09-23 | 1913-03-25 | 1913-09-24 | $7700.00 | Window Closed / Lapsed |