US1840105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid purification
Assignee: GEN ZEOLITE Co
•
Filing: 1928-03-15
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Granted: 1932-01-05
•
Expires: 1948-03-15
Abstract
No abstract record available.
Inventors
- 👤 Robert H Kean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:53
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/427; B01D61/4271; C; C02; C02F; C02F1/00; C02F1/46; C02F1/4604; C02F1/469; C02F1/4698; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/46115
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) | 1935-01-04 | 1935-07-06 | 1936-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-04 | 1939-07-06 | 1940-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-04 | 1943-07-06 | 1944-01-05 | $7700.00 | Window Closed / Lapsed |