Patent US1516337A successfully refreshed from Google Patents.
US1516337A
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Purifying liquids
Assignee: Individual
•
Filing: 1922-09-29
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Granted: 1924-11-18
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Expires: 1942-09-29
Abstract
No abstract record available.
Inventors
- 👤 Cumming Alexander Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:54
CPC Classifications
B; B01; B01D; B01D15/00; C; C13; C13B; C13B20/00; C13B20/12
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) | 1927-11-18 | 1928-05-19 | 1928-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-11-18 | 1932-05-19 | 1932-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-11-18 | 1936-05-19 | 1936-11-18 | $7700.00 | Window Closed / Lapsed |