US4473664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored inert material for separation of anion and cation resin components
Assignee: Sybron Chemical Holdings Inc
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Filing: 1983-07-20
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Granted: 1984-09-25
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Expires: 2003-07-20
Abstract
Abstract An inert bead form polymer, of intermediate settling velocity between cation and anion exchange resins, which is dyed a highly visible color.
Inventors
- 👤 Stanley M. Ziarkowski
- 👤 James M. Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/02; B01J47/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
A mixed bed ion exchange system which comprises two layers of anion and cation exchange resins, respectively, an inert layer of polymeric material in bead form separating said ion exchange layers, said inert layer being dyed a highly visible, bright color and which exhibits the following typical characteristics: Polymer Structure: Crosslinked inert polymer Form (physical): spherical beads Functional group: None Water retention (after hydration): 7-9% Maximum temperature: 212° F. (100° C.) Screen size, U.S. Std. (nominal): 16-30 mesh (wet) Operating pH range: 0-14 Solubility: Insoluble in all common solvents Specific gravity: 1.15 Approximate shipping weight (dry): 43 lbs./cu. ft.
Claim 2
Dependent Claim
99 words
A mixed bed ion exchange system which comprises two layers of anion and cation exchange resins, respectively, an inert layer of polymeric material in bead form separating said ion exchange layers, said inert layer being dyed a highly visible, bright color and which exhibits the following typical characteristics: Polymer Structure: Crosslinked inert polymer Form (physical): spherical beads Functional group: None Water retention (after hydration): 7-9% Maximum temperature: 212° F. (100° C.) Screen size, U.S. Std. (nominal): 16-30 mesh (wet) Operating pH range: 0-14 Solubility: Insoluble in all common solvents Specific gravity: 1.15 Approximate shipping weight (dry): 43 lbs./cu. ft.
Claim 3
Dependent Claim
15 words
The system of claim 1 in which the inert layer comprises a crosslinked methacrylic polymer.
Claim 4
Dependent Claim
16 words
The system of claim 1 in which the inert layer is dyed a bright blue color.
Claim 5
Dependent Claim
27 words
The system of claim 1 in which the dyed inert crosslinked polymer comprises one material selected from the group consisting of acrylics, methacrylics, styrene and styrene derivatives.
References Cited (Backward Citations)
US3957741A
Cited
US4151332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |