US2529398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purifying and conditioning
Assignee: —
•
Filing: —
•
Granted: 1950-11-07
•
Expires: 1967-11-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:39
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001; C02F1/003; B; B01; B01D; B01D29/00; B01D29/96; B01D35/00; B01D35/16; B01D37/00; B01D37/02; B01D37/025; F; F01; F01M; F01M11/00; F01M11/03; F01P; F01P11/00; F01P11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1914829A
Cited
FR784957A
Cited
US2007615A
Cited
US2082322A
Cited
US2057237A
Cited
US2072848A
Cited
US2110009A
Cited
US2156329A
Cited
US2158512A
Cited
US2338158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |