US3779952A
Expired / Lapsed
US
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Metal-containing polymers
Assignee: Shell USA Inc
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Filing: 1971-03-22
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Granted: 1973-12-18
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Expires: 1991-03-22
Abstract
Abstract POROUS, METAL-ION-CHAIN-BRIDGED POLYMERIC PRODUCTS HAVING SURFACE AREAS OF AT LEAST 5 M.2/G. USEFUL AS CATALYSTS AND FOR MOLECULAR SEPARATIONS ARE PREPARED BY CONTACTING GROUP III-B-V-A METAL IONS AND A DILUTE, POLAR, NONAQUEOUS SOLUTION OF A POLYMERIZED ETHYLENICALLY-UNSATURATED CARBOXYLIC ACID AND THEREAFTER REMOVING RESIDUAL SOLVENT FROM THE RESULTING PRECIPITATE FORMING THE POROUS METAL/POLYMERIC PRODUCT.
Inventors
- 👤 W Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:29
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42; B; B01; B01J; B01J37/00; B01J37/02; B01J37/024; C01; C01B; C01B13/00; C01B13/14; C01P; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/14; Y; Y10; Y10S; Y10S260/00; Y10S260/31; Y10S260/33; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |