Patent US645432A successfully refreshed from Google Patents.
US3047516A
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Weakly basic anion exchange resins
Assignee: ChampionX LLC
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Filing: 1960-04-22
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Granted: 1962-07-31
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Expires: 1980-04-22
Abstract
No abstract record available.
Inventors
- 👤 Charles A Feldt
- 👤 George T Kekish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:25
CPC Classifications
C; C08; C08F; C08F8/00; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A WEAKLY BASIC WATER INSOLUBLE ANION EXCHANGE RESIN COMPRISING THE CONDENSATION TERPOLYMER FORMED AS THE REACTION PRODUCT OF AN ADDITION POLYMER OF A NITROGEN HETEROCYCLIC VINYL COMPOUND, AND A CONDENSATION COPOLYMER OF AMMONIA AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF EPIHALOHYDRINS AND GLYCEROL A-MONOHALOHYDRINS, SAID COPOLYMER BEING THE REACTION PRODUCT OF AQUEOUS AMMONIA TO HALOHYDRIN IN A MOLAR RATIO OF FROM 1:1 TO 4:1.
Claim 2
Dependent Claim
66 words
A WEAKLY BASIC WATER INSOLUBLE ANION EXCHANGE RESIN COMPRISING THE CONDENSATION TERPOLYMER FORMED AS THE REACTION PRODUCT OF AN ADDITION POLYMER OF A NITROGEN HETEROCYCLIC VINYL COMPOUND, AND A CONDENSATION COPOLYMER OF AMMONIA AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF EPIHALOHYDRINS AND GLYCEROL A-MONOHALOHYDRINS, SAID COPOLYMER BEING THE REACTION PRODUCT OF AQUEOUS AMMONIA TO HALOHYDRIN IN A MOLAR RATIO OF FROM 1:1 TO 4:1.
References Cited (Backward Citations)
US2104092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |