US3458436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment of liquids with ion exchangers
Assignee: Bayer AG
•
Filing: 1964-11-18
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Granted: 1969-07-29
•
Expires: 1984-11-18
Abstract
No abstract record available.
Inventors
- 👤 Friedrich Martinola
- 👤 Gunter Siegers
- 👤 Erwin Wolniewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:43
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US356819A
Cited
US1698743A
Cited
US1697835A
Cited
GB756735A
Cited
US2891007A
Cited
US3173862A
Cited
US3171802A
Cited
FR1363510A
Cited
US3312617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |