US2670081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purifier
Assignee: Individual
•
Filing: 1952-01-17
•
Granted: 1954-02-23
•
Expires: 1972-01-17
Abstract
No abstract record available.
Inventors
- 👤 David H Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:34
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/26; C; C02; C02F; C02F1/00; C02F1/001; C02F1/002; C02F9/00; C02F9/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US519664A
Cited
US537178A
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US576452A
Cited
US629387A
Cited
US647580A
Cited
US701373A
Cited
US1119942A
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US2324194A
Cited
US2566371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |