Patent US3418262A successfully refreshed from Google Patents.
US3418262A
Expired / Lapsed
US
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Preparation of macroporous ion exchange resins
Assignee: Rohm and Haas Co
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Filing: 1967-04-19
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Granted: 1968-12-24
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Expires: 1987-04-19
Abstract
No abstract record available.
Inventors
- 👤 Louis E Werotte
- 👤 Paul D Grammont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:56
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/286; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18; C08F8/00; C08J2357/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |