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US2485352A
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Method of making an ion-exchange material from light oil acid sluidges
Assignee: INTERIAKE CHEMICAL Corp
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Filing: 1946-09-07
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Granted: 1949-10-18
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Expires: 1966-09-07
Abstract
No abstract record available.
Inventors
- 👤 Jr John R Bircher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:17
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2191060A
Cited
US2337500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |