US3342755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation stable halogen containing cation exchange resins
Assignee: Sybron Transition Corp
•
Filing: 1963-01-21
•
Granted: 1967-09-19
•
Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Calmon Calvin
- 👤 Albert H Greer
- 👤 Wood William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:33
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR PRODUCING CATION EXCHANGE RESINS HAVING IMPROVED OXIDATION STABILITY CONSISTING OF THE STEPS OF TREATING A COPOLYMER OF A MONOVINYL AROMATIC HYDROCARBON MONOMER AND A POLYVINYL CROSS-LINKING COMPOUND WITH A HALOGENATING AGENT SELECTED FROM THE CLASS CONSISTING OF CHLORINE AND BROMINE AND THEIR CHLORINE AND BROMINE CONTAINING DERIVATIVES SELECTED FROM THE CLASS CONSISTING OF SULFURYL CHLORIDE, PHOSPHORUS TRICHLORIDE, PHOSPHORUS PENTACHLORIDE, PHOSPHORUS OXYCHLORIDE, TRICHLOROMETHYLSULPHENYL CHLORIDE, T-BUTYL HYPOCHLORITE, NCHLORO PHTHALIMIDE, N-BROMO PHTHALIMIDE, PHOSPHOROUS TRIBROMIDE, AND SULFURYL BROMIDE, WHEREIN SAID HALOGENATING IS CONDUCTED IN THE PRESENCE OF A FREE RADICAL PRODUCING CATALYST AND A LIQUID SWELLING AGENT FOR SAID COPOLYMER, WHEREBY SUBSTITUTION OF HALOGEN FOR HYDROGEN TAKES PLACE MAINLY IN THE POLYETHYTLENE CONNECTING CHAIN BETWEEN THE AROMATIC GROUPS OF THE COPOLYMER; AND SULFONATING SAID HALOGENATED CROSS-LINKED COPOLYMER.
Claim 2
Dependent Claim
126 words
A PROCESS FOR PRODUCING CATION EXCHANGE RESINS HAVING IMPROVED OXIDATION STABILITY CONSISTING OF THE STEPS OF TREATING A COPOLYMER OF A MONOVINYL AROMATIC HYDROCARBON MONOMER AND A POLYVINYL CROSS-LINKING COMPOUND WITH A HALOGENATING AGENT SELECTED FROM THE CLASS CONSISTING OF CHLORINE AND BROMINE AND THEIR CHLORINE AND BROMINE CONTAINING DERIVATIVES SELECTED FROM THE CLASS CONSISTING OF SULFURYL CHLORIDE, PHOSPHORUS TRICHLORIDE, PHOSPHORUS PENTACHLORIDE, PHOSPHORUS OXYCHLORIDE, TRICHLOROMETHYLSULPHENYL CHLORIDE, T-BUTYL HYPOCHLORITE, NCHLORO PHTHALIMIDE, N-BROMO PHTHALIMIDE, PHOSPHOROUS TRIBROMIDE, AND SULFURYL BROMIDE, WHEREIN SAID HALOGENATING IS CONDUCTED IN THE PRESENCE OF A FREE RADICAL PRODUCING CATALYST AND A LIQUID SWELLING AGENT FOR SAID COPOLYMER, WHEREBY SUBSTITUTION OF HALOGEN FOR HYDROGEN TAKES PLACE MAINLY IN THE POLYETHYTLENE CONNECTING CHAIN BETWEEN THE AROMATIC GROUPS OF THE COPOLYMER; AND SULFONATING SAID HALOGENATED CROSS-LINKED COPOLYMER.
References Cited (Backward Citations)
US2733231A
Cited
US2527300A
Cited
US2628193A
Cited
US2645621A
Cited
US2764561A
Cited
US3009906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |