Patent US3686071A successfully refreshed from Google Patents.
US913034A
Expired / Lapsed
US
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Purification and clarification of water.
Assignee: Individual
•
Filing: 1908-05-29
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Granted: 1909-02-23
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Expires: 1928-05-29
Abstract
No abstract record available.
Inventors
- 👤 William Mcmurtrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:57
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236
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) | 1912-02-23 | 1912-08-24 | 1913-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-02-23 | 1916-08-24 | 1917-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-02-23 | 1920-08-24 | 1921-02-23 | $7700.00 | Window Closed / Lapsed |