Patent US2944033A successfully refreshed from Google Patents.
US2944033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exchange resins from nu-halogenated copolymers
Assignee: Individual
•
Filing: 1956-06-25
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Granted: 1960-07-05
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Goodman Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:47
CPC Classifications
C; C08; C08F; C08F8/00; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
INSOLUBLE COMPLEX, HIGH MOLECULAR WEIGHT, POLYMERIC EXCHANGE RESINS HAVING EXCHANGEABLE POSITIVE CHLORINE ATOMS AND CONSISTING BASICALLY OF A HIGH MOLECULAR WEIGHT COPOLYMER OF STYRENE AND MALEIC ANHYDRIDE CONTAINING N-HALOGEN AMIDE GROUPS, SAID COPOLYMER BEING CROSSLINKED WITH DIAMINES THROUGH CARBOXYL AND HAVING THE N ATOMS OF THE DIAMINES N-CHLORINATED.
Claim 2
Dependent Claim
48 words
INSOLUBLE COMPLEX, HIGH MOLECULAR WEIGHT, POLYMERIC EXCHANGE RESINS HAVING EXCHANGEABLE POSITIVE CHLORINE ATOMS AND CONSISTING BASICALLY OF A HIGH MOLECULAR WEIGHT COPOLYMER OF STYRENE AND MALEIC ANHYDRIDE CONTAINING N-HALOGEN AMIDE GROUPS, SAID COPOLYMER BEING CROSSLINKED WITH DIAMINES THROUGH CARBOXYL AND HAVING THE N ATOMS OF THE DIAMINES N-CHLORINATED.
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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |