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US761187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clarifying and filtering apparatus.
Assignee: Individual
•
Filing: 1903-10-02
•
Granted: 1904-05-31
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Expires: 1923-10-02
Abstract
No abstract record available.
Inventors
- 👤 David L Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:28
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001
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) | 1907-05-31 | 1907-11-30 | 1908-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-05-31 | 1911-11-30 | 1912-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-05-31 | 1915-11-30 | 1916-05-31 | $7700.00 | Window Closed / Lapsed |