US2746938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonated methylbenzene-halogenated hydrocarbon condensation products as cation exchange resins
Assignee: Bayer AG
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Filing: 1952-05-06
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Granted: 1956-05-22
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Expires: 1972-05-06
Abstract
No abstract record available.
Inventors
- 👤 Ehm Wilhelm
- 👤 Schnegg Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:54
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
PROCESS FOR THE PRODUCTION OF CATION EXCHANGING RESINS WHICH COMPRISES REACTING (1) A LIQUID METHYL-SUBSTITUTED BENZENE HYDROCARBON WITH (2) A POLYHALOGENATED SATURATED ALIPHATIC HYDROCARBON, WHICH IS SUBSTITUTED BY AT LEAST TWO HALOGEN ATOMS, SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST AND AT ELEVATED TEMPERATURE, AT LEAST UNTIL THE REACTION PRODUCTS OBTAINED ARE HARD, NONPLASTIC AND INFUSIBLE RESINS, AND TREATING SAID RESINS WITH SULFONATING AGENTS.
Claim 2
Dependent Claim
74 words
PROCESS FOR THE PRODUCTION OF CATION EXCHANGING RESINS WHICH COMPRISES REACTING (1) A LIQUID METHYL-SUBSTITUTED BENZENE HYDROCARBON WITH (2) A POLYHALOGENATED SATURATED ALIPHATIC HYDROCARBON, WHICH IS SUBSTITUTED BY AT LEAST TWO HALOGEN ATOMS, SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST AND AT ELEVATED TEMPERATURE, AT LEAST UNTIL THE REACTION PRODUCTS OBTAINED ARE HARD, NONPLASTIC AND INFUSIBLE RESINS, AND TREATING SAID RESINS WITH SULFONATING AGENTS.
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |