Patent US4519905A successfully refreshed from Google Patents.
US4519905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High performance analytical column for anion determination
Assignee: Dionex Corp
•
Filing: 1984-07-02
•
Granted: 1985-05-28
•
Expires: 2004-07-02
Abstract
Abstract An improved chromatographic analytical column, the column containing a pellicular type (agglomerated) anion-exchange packing, comprising: Component A, which comprises a pressure packed bed of substrate particles of insoluble synthetic resin, having cation-exchanging sites at least on their available surfaces, the Component A particles being of low porosity relative to Component B microparticles, described below, and Component B, derived by agglomerating microparticles of insoluble synthetic resin onto the pressure packed bed of Component A particles, the microparticles having a volume average diameter of less than about 1,500 and greater than about 50 Angstroms and having anion-exchanging sites, at least on their outer surfaces, which attract available cation sites of Component A, wherein the microparticles of Component B are attached as a monolayer to the available surfaces of the Component A particles.
Inventors
- 👤 Timothy S. Stevens
- 👤 Martin A. Langhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:15
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/286; B01J20/30; B01J20/32; B01J20/3214; B01J20/3217; B01J20/3221; B01J41/00; B01J41/20; G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/56; G01N30/96; B01J2220/00; B01J2220/50; B01J2220/54; B01J2220/58
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
130 words
A chromatographic analytical column, the column containing a pellicular type (agglomerated) anion-exchange packing, comprising: Component A, which comprises a pressure packed bed of substrate particles of insoluble synthetic resin, having cation-exchanging sites at least on their available surfaces, the Component A particles being of low porosity relative to Component B microparticles, described below, and Component B, derived by agglomerating microparticles of insoluble synthetic resin onto the pressure packed bed of Component A particles, the microparticles having a volume average diameter of less than about 1000 Angstroms and greater than about 50 Angstroms and having anion-exchanging sites, at least on their outer surfaces, which attract available cation sites of Component A, wherein the microparticles of Component B are attached as a monolayer to the available surfaces of the Component A particles.
Claim 2
Dependent Claim
130 words
A chromatographic analytical column, the column containing a pellicular type (agglomerated) anion-exchange packing, comprising: Component A, which comprises a pressure packed bed of substrate particles of insoluble synthetic resin, having cation-exchanging sites at least on their available surfaces, the Component A particles being of low porosity relative to Component B microparticles, described below, and Component B, derived by agglomerating microparticles of insoluble synthetic resin onto the pressure packed bed of Component A particles, the microparticles having a volume average diameter of less than about 1000 Angstroms and greater than about 50 Angstroms and having anion-exchanging sites, at least on their outer surfaces, which attract available cation sites of Component A, wherein the microparticles of Component B are attached as a monolayer to the available surfaces of the Component A particles.
Claim 3
Dependent Claim
22 words
The analytical column of claim 1 in which the volume average diameter of the microparticles is not greater than about 900 Angstroms.
Claim 4
Dependent Claim
12 words
The analytical column of claim 2 in which the microparticles are monodisperse.
Claim 5
Dependent Claim
26 words
The analytical column of claim 1 comprising component A consisting essentially of monodisperse particles of insoluble synthetic resin of between about 5 to 75 microns diameter.
Claim 6
Dependent Claim
30 words
The analytical column of claim 4 comprising Component B consisting essentially of monodisperse microparticles of insoluble synthetic resin, the volume average of which is not greater than about 900 Angstroms.
Claim 7
Dependent Claim
20 words
The analytical column of claim 5 comprising Component A consisting essentially of insoluble synthetic resin particles of the gel type.
Claim 8
Dependent Claim
23 words
The analytical column of claim 4 in which the volume average diameter of the microparticles is from between about 50 to 600 Angstroms.
Claim 9
Dependent Claim
20 words
The analytical column of claim 7 comprising Component A consisting essentially of insoluble synthetic resin particles of the gel type.
Claim 10
Dependent Claim
26 words
The analytical column of claim 1 comprising Component A consisting essentially of monodisperse particles of insoluble synthetic resin of between about 5 to 35 microns diameter.
Claim 11
Dependent Claim
31 words
The analytical column of claim 9 comprising Component B consisting essentially of monodisperse microparticles of insoluble synthetic resin, the volume average diameter of which is between about 50 to 900 Angstroms.
Claim 12
Dependent Claim
20 words
The analytical column of claim 10 comprising Component A consisting essentially of insoluble synthetic resin particles of the gel type.
Claim 13
Dependent Claim
32 words
The analytical column of claim 9 comprising Component B consisting essentially of monodisperse microparticles of insoluble synthetic resin, the volume average diameter of which is from between about 50 to 600 Angstroms.
Claim 14
Dependent Claim
20 words
The analytical column of claim 12 comprising Component A consisting essentially of insoluble synthetic resin particles of the gel type.
Claim 15
Dependent Claim
26 words
The analytical column of claim 1 comprising Component A consisting essentially of monodisperse particles of insoluble synthetic resin of between about 5 to 20 microns diameter.
Claim 16
Dependent Claim
31 words
The analytical column of claim 14 comprising Component B consisting essentially of monodisperse microparticles of insoluble synthetic resin, the volume average diameter of which is between about 50 to 900 Angstroms.
Claim 17
Dependent Claim
20 words
The analytical column of claim 15 comprising Component A consisting essentially of insoluble synthetic resin particles of the gel type.
Claim 18
Dependent Claim
22 words
The analytical column of claim 15 in which the volume average diameter of the microparticles is not greater than about 600 Angstroms.
Claim 19
Dependent Claim
18 words
The analytical column of claim 17 comprising Component A consisting essentially of synthetic resin of the gel type.
Claim 20
Dependent Claim
22 words
The analytical column of claim 15 in which the volume average diameter of the microparticles is not greater than about 300 Angstroms.
Claim 21
Dependent Claim
18 words
The analytical column of claim 19 comprising Component A consisting essentially of synthetic resin of the gel type.
Claim 22
Dependent Claim
38 words
The analytical column of claim 1 comprising Component A consisting essentially of monodisperse particles of an insoluble sulfonated poly(vinyl aromatic) resin, and Component B consisting essentially of an insoluble aminated poly(vinyl aromatic) resin of latex derived monodisperse microparticles.
Claim 23
Dependent Claim
22 words
The analytical column of claim 21 in which the volume average diameter of the microparticles is not greater than about 900 Angstroms.
Claim 24
Dependent Claim
19 words
The analytical column of claim 22 comprising Component A consisting essentially of insoluble synthetic resin of the gel type.
Claim 25
Dependent Claim
21 words
The analytical column of claim 21 comprising Component A consisting essentially of particles of between about 5 to 75 microns diameter.
Claim 26
Dependent Claim
23 words
The analytical column of claim 24 in which the volume average diameter of the microparticles is from between about 50 to 900 Angstroms.
Claim 27
Dependent Claim
19 words
The analytical column of claim 25 comprising Component A consisting essentially of insoluble synthetic resin of the gel type.
Claim 28
Dependent Claim
22 words
The analytical column of claim 24 in which the volume average diameter of the microparticles is not greater than about 600 Angstroms.
Claim 29
Dependent Claim
18 words
The analytical column of claim 27 comprising Component A consisting essentially of synthetic resin of the gel type.
Claim 30
Dependent Claim
22 words
The analytical column of claim 24 in which the volume average diameter of the microparticles is not greater than about 300 Angstroms.
Claim 31
Dependent Claim
19 words
The analytical column of claim 29 comprising Component A consisting essentially of insoluble synthetic resin of the gel type.
Claim 32
Dependent Claim
21 words
The analytical column of claim 21 comprising Component A consisting essentially of particles of between about 5 to 35 microns diameter.
Claim 33
Dependent Claim
23 words
The analytical column of claim 31 in which the volume average diameter of the microparticles is from between about 50 to 900 Angstroms.
Claim 34
Dependent Claim
18 words
The analytical column of claim 32 comprising Component A consisting essentially of synthetic resin of the gel type.
Claim 35
Dependent Claim
22 words
The analytical column of claim 31 in which the volume average diameter of the microparticles is not greater than about 600 Angstroms.
Claim 36
Dependent Claim
18 words
The analytical column of claim 34 comprising Component A consisting essentially of synthetic resin of the gel type.
Claim 37
Dependent Claim
22 words
The analytical column of claim 31 in which the volume average diameter of the microparticles is not greater than about 300 Angstroms.
Claim 38
Dependent Claim
18 words
The analytical column of claim 36 comprising Component A consisting essentially of synthetic resin of the gel type.
Claim 39
Dependent Claim
21 words
The analytical column of claim 16 comprising Component A consisting essentially of particles of between about 5 to 20 microns diameter.
Claim 40
Dependent Claim
23 words
The analytical column of claim 36 in which the volume average diameter of the microparticles is from between about 50 to 300 Angstroms.
Claim 41
Dependent Claim
19 words
The analytical column of claim 39 comprising Component A consisting essentially of insoluble synthetic resin of the gel type.
Claim 42
Dependent Claim
22 words
The analytical column of claim 38 in which the volume average diameter of the microparticles is between about 50 to 600 Angstroms.
Claim 43
Dependent Claim
19 words
The analytical column of claim 41 comprising Component A consisting essentially of insoluble synthetic resin of the gel type.
Claim 44
Dependent Claim
22 words
The analytical column of claim 38 in which the volume average diameter of the microparticles is between about 50 to 300 Angstroms.
Claim 45
Dependent Claim
19 words
The analytical column of claim 43 comprising Component A consisting essentially of insoluble synthetic resin of the gel type.
Claim 46
Dependent Claim
52 words
The analytical column of claim 1 comprising Component A consisting essentially of monodisperse particles of an insoluble sulfonated styrene-divinylbenzene copolymer resin, and Component B consisting essentially of monodisperse microparticles of an insoluble quaternized vinylbenzylchloride-divinylbenzene copolymer latex derived resin having anion exchanging sites substantially throughout the entirety of a majority of the microparticles.
Claim 47
Dependent Claim
20 words
The analytical column of claim 45 comprising Component A consisting essentially of a gel form resin of said styrene-divinylbenzene copolymer.
Claim 48
Dependent Claim
38 words
The analytical column of claim 45 comprising Component A consisting essentially of particles of about 5 to 75 microns diameter, and Component B in which the volume average diameter of the microparticles is less than about 900 Angstroms.
Claim 49
Dependent Claim
20 words
The analytical column of claim 47 comprising Component A consisting essentially of a gel form resin of said styrene-divinylbenzene copolymer.
Claim 50
Dependent Claim
40 words
The analytical column of claim 45 comprising Component A consisting essentially of particles of about 5 to 35 microns diameter, and Component B in which the volume average diameter of the microparticles is from between about 50 to 900 Angstroms.
Claim 51
Dependent Claim
20 words
The analytical column of claim 49 comprising Component A consisting essentially of a gel form resin of said styrene-divinylbenzene copolymer.
Claim 52
Dependent Claim
22 words
The analytical column of claim 49 in which the volume average diameter of the microparticles is between about 50 to 600 Angstroms.
Claim 53
Dependent Claim
20 words
The analytical column of claim 51 comprising Component A consisting essentially of a gel form resin of said styrene-divinylbenzene copolymer.
Claim 54
Dependent Claim
38 words
The analytical column of claim 45 comprising Component A consisting essentially of particles of about 5 to 20 microns, and Component B in which the volume average diameter of the microparticles is between about 50 to 900 Angstroms.
Claim 55
Dependent Claim
20 words
The analytical column of claim 53 comprising Component A consisting essentially of a gel form resin of said styrene-divinylbenzene copolymer.
Claim 56
Dependent Claim
22 words
The analytical column of claim 53 in which the volume average diameter of the microparticles is between about 50 to 600 Angstroms.
Claim 57
Dependent Claim
20 words
The analytical column of claim 55 comprising Component A consisting essentially of a gel form resin of said styrene-divinylbenzene copolymer.
Claim 58
Dependent Claim
22 words
The analytical column of claim 53 in which the volume average diameter of the microparticles is between about 50 to 300 Angstroms.
Claim 59
Dependent Claim
20 words
The analytical column of claim 7 comprising Component A consisting essentially of a gel form resin of said styrene-divinylbenzene copolymer.
References Cited (Backward Citations)
US2875162A
Cited
US2910445A
Cited
US3920397A
Cited
US3966596A
Cited
US4101460A
Cited
US4070283A
Cited
US4160728A
Cited
US4119580A
Cited
US4280923A
Cited
US4252644A
Cited
US4252905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |