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US3434979A
Expired / Lapsed
US
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Oleophilic-hydrophilic ion exchange resins
Assignee: GUENTHER K HOESCHELE
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Filing: 1965-05-11
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Granted: 1969-03-25
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Expires: 1985-05-11
Abstract
No abstract record available.
Inventors
- 👤 Harry P Gregor
- 👤 Philippe Teyssie
- 👤 Guenther K Hoeschele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/36; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2798053A
Cited
DE1082056B
Cited
GB849066A
Cited
US3226380A
Cited
US3259592A
Cited
US3304294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |