US3298969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing graft copolymers for ion exchange and chelating purposes
Assignee: Metal Recovery Systems
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Filing: 1960-05-12
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Granted: 1967-01-17
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Expires: 1980-05-12
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/18; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; B01J41/00; B01J41/08; B01J41/12; B01J41/14; B01J45/00; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12; C08F8/00; C08F8/02; C08F8/06; C08F8/12; C08F8/30; C08F8/32; C08F8/34; C08F8/36; C08F8/44; C08J; C08J5/00; C08J5/20; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20; C08J2323/00; C08J2323/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE PROCESS OF PREPARING GRAFT COPOLYMERS WHICH COMPRISES ABSORBING A WATER-INSOLUBLE MONOMER HAVING AT LEAST ONE CHI=C> GROUP INTO A PEROXIDIZED SYNTHETIC ORGANIC POLYMER IN SOLID UNDISSOLVED FORM AT A NONREACTIVE TEMPERATURE, SEPARATING SAID SOLID POLYMER FROM EXCESS NON-ABSORBED MONOMER, AND THEREAFTER HEATING SAID POLYMER WITH ABSORBED MONOMER IN A NON-REACTIVE AQUEOUS MEDIUM TO CAUSE REACTION BETWEEN SAID POLYMER AND SAID MONOMER.
Claim 2
Dependent Claim
62 words
THE PROCESS OF PREPARING GRAFT COPOLYMERS WHICH COMPRISES ABSORBING A WATER-INSOLUBLE MONOMER HAVING AT LEAST ONE CHI=C> GROUP INTO A PEROXIDIZED SYNTHETIC ORGANIC POLYMER IN SOLID UNDISSOLVED FORM AT A NONREACTIVE TEMPERATURE, SEPARATING SAID SOLID POLYMER FROM EXCESS NON-ABSORBED MONOMER, AND THEREAFTER HEATING SAID POLYMER WITH ABSORBED MONOMER IN A NON-REACTIVE AQUEOUS MEDIUM TO CAUSE REACTION BETWEEN SAID POLYMER AND SAID MONOMER.
References Cited (Backward Citations)
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Cited
US2746944A
Cited
US2837496A
Cited
US2907675A
Cited
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Cited
US2910445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |