US3767600A
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Porous polymers with ionic functional groups based on polyfunctional methacrylates
Assignee: Rohm and Haas Co
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Filing: 1972-05-11
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Granted: 1973-10-23
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Expires: 1992-05-11
Abstract
Abstract POROUS POLYMERS CONTAINING A POLYFUNCTIONAL METHACRYLATE SUCH AS TRIMETHYLOLPROPANE TRIMETHYACRYLATE HAVE ION EXCHANGE PROPERTIES WHEN IONIC FUNCTIONAL GROUPS ARE INCORPORATED INTO THE RESIN STRUCTURE.
Inventors
- 👤 R Albright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/20; B; B01; B01J; B01J20/00; B01J20/22; B01J20/26; B01J20/261; B01J20/265; B01J20/267; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; B01J41/00; B01J41/08; B01J41/12; B01J41/14; C08F8/00; C08J; C08J9/00; C08J9/26; C08J9/28; C08J9/286; C08J2357/00
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |