Patent US2393632A successfully refreshed from Google Patents.
Patent US4746572A successfully refreshed from Google Patents.
US4746572A
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Structures surface modified with bidentate silanes
Assignee: Fleet Capital Corp
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Filing: 1986-11-28
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Granted: 1988-05-24
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Expires: 2006-11-28
Abstract
Abstract A bidentate silane containing at least two silicon atoms bridged by certain groups, arranged to form at least a seven member ring system, is formed between the bidentate silane and the atoms to which the silane is covalently attached on the substrate surface.
Inventors
- 👤 Joseph L. Glajch
- 👤 Joseph J. Kirkland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:09
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/286; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3206; B01J20/3208; B01J20/3212; B01J20/3214; B01J20/3217; B01J20/3219; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3257; B01J20/3259; B01J20/3261; G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/56; G01N2030/567; G01N30/88; G01N2030/8809; G01N2030/8813; G01N2030/8831; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/2996; Y10T428/2998; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
122 words
An improved support comprising a substrate and a bidentate silane attached to the substrate, the bidentate silane containing at least two silicon atoms bridged by certain groups, so arranged that at least a seven-membered ring system is formed in the following manner: ##STR8## where, R 1 -R 4 =alkane, substituted alkane, alkene, substituted alkene, aryl, or substituted arryl; Y=--CH 2 --, --CH 2 CH 2 --, --(CH 2 )n--, --(CHZ--CHZ)--, or --(CH 2 ) n CHZ--, where Z=alkane, substituted alkane, alkene, substituted alkene, aryl, substituted aryl, halogen, hydroxyl, hydrogen, nitrile, primary, secondary or tertiary or tetralkylamine, carbonyl, carboxyl, amide, sulfonic acid, nitro, nitroso, sulfonamide, etc., n=1-6, and A are the atoms on the substrate surface to which the silane is covalently attached.
Claim 2
Dependent Claim
122 words
An improved support comprising a substrate and a bidentate silane attached to the substrate, the bidentate silane containing at least two silicon atoms bridged by certain groups, so arranged that at least a seven-membered ring system is formed in the following manner: ##STR8## where, R 1 -R 4 =alkane, substituted alkane, alkene, substituted alkene, aryl, or substituted arryl; Y=--CH 2 --, --CH 2 CH 2 --, --(CH 2 )n--, --(CHZ--CHZ)--, or --(CH 2 ) n CHZ--, where Z=alkane, substituted alkane, alkene, substituted alkene, aryl, substituted aryl, halogen, hydroxyl, hydrogen, nitrile, primary, secondary or tertiary or tetralkylamine, carbonyl, carboxyl, amide, sulfonic acid, nitro, nitroso, sulfonamide, etc., n=1-6, and A are the atoms on the substrate surface to which the silane is covalently attached.
Claim 3
Dependent Claim
20 words
The support of claim 1 wherein substantially all of the silane is bonded to the substrate through both Si atoms.
Claim 4
Dependent Claim
28 words
The support of claim 1 wherein the substrate is a metal-oxide, metalloid oxide or organic polymer or plastic having a surface capable of reacting with bidentate silane reagents.
Claim 5
Dependent Claim
12 words
The support of claim 2 wherein the substrate is silica and Y=--O--.
Claim 6
Dependent Claim
16 words
The support of claim 1 wherein the substrate is silica and Y=--CH 2 --CH 2 --.
Claim 7
Dependent Claim
10 words
The support of claim 4 wherein the silica is porous.
Claim 8
Dependent Claim
10 words
The support of claim 5 wherein the silica is porous.
Claim 9
Dependent Claim
51 words
The support set forth in claim 3 wherein Y=--CH(--CH═CH 2 )--CH(--CH═CH 2 ); --CH[(CH 2 ) 3 NH 2 ]; --CH[(CH 2 ) 3 CN]--CH[(CH 2 ) 3 CN]; --CH(C 18 )--; --CH--[(CH 2 ) 3 --O--CH(OH)CH 2 --OH]CH[(CH 2 ) 3 --O--CH(OH)CH 2 --OH]; or --CH(C 8 )--CH(C 8 ).
Claim 10
Dependent Claim
51 words
The support set forth in claim 6 wherein Y=--CH(--CH═CH 2 )--CH(--CH═CH 2 ); --CH[(CH 2 ) 3 NH 2 ]; --CH[(CH 2 ) 3 CN]--CH[(CH 2 ) 3 CN]; --CH(C 18 )--; --CH--[(CH 2 ) 3 --O--CH(OH)CH 2 --OH]CH[(CH 2 ) 3 --O--CH(OH)CH 2 --OH]; or --CH(C 8 )--CH(C 8 ).
Claim 11
Dependent Claim
51 words
The support set forth in claim 7 wherein Y=--CH(--CH═CH 2 )--CH(--CH═CH 2 ); --CH[(CH 2 ) 3 NH 2 ]; --CH[(CH 2 ) 3 CN]--CH[(CH 2 ) 3 CN]; --CH(C 18 )--; --CH--[(CH 2 ) 3 --O--CH(OH)CH 2 --OH]CH[(CH 2 ) 3 --O--CH(OH)CH 2 --OH]; or --CH(C 8 )--C(C 8 ).
Claim 12
Dependent Claim
24 words
The support set forth in claim 1 which is made by reacting a bidentate silane reagent with the substrate which contains reactive surface groups.
Claim 13
Dependent Claim
16 words
The support set forth in claim 11 wherein the reactive surface groups include --OH or --Cl.
Claim 14
Dependent Claim
21 words
The support set forth in claim 11 wherein the reactive surface groups are established by hydroxylating the surface of the substrate.
Claim 15
Dependent Claim
9 words
The support of claim 1 used for chromatographic separations.
Claim 16
Dependent Claim
9 words
The support of claim 6 used for chromatographic separations.
Claim 17
Dependent Claim
9 words
The support of claim 7 used for chromatographic separations.
Claim 18
Dependent Claim
15 words
The support of claim 11 wherein the silicon atoms of the bidentate silane are monofunctional.
Claim 19
Dependent Claim
23 words
An improved support according to claim 1 wherein the R 1 -R 4 groups provide steric protection of the bonded silane from hydrolysis.
Claim 20
Dependent Claim
21 words
The support set forth in claim 18 wherein R 1 -R 4 are isopropyl, secondary butyl, isobutyl, t-butyl, neopentyl, or cyclohexyl.
Claim 21
Dependent Claim
18 words
The support set forth in claim 6 wherein R 1 -R 4 are isopropyl, isobutyl, t-butyl or neopentyl.
Claim 22
Dependent Claim
18 words
The support set forth in claim 7 wherein R 1 -R 4 are isopropyl, isobutyl, t-butyl or neopentyl.
Claim 23
Dependent Claim
18 words
The support set forth in claim 9 wherein R 1 -R 4 are isopropyl, isobutyl, t-butyl or neopentyl.
Claim 24
Dependent Claim
18 words
The support set forth in claim 10 wherein R 1 -R 4 are isopropyl, isobutyl, t-butyl or neopentyl.
Claim 25
Dependent Claim
34 words
The support set forth in claim 1 wherein Y is selected to provide a spacing between the two reactable atoms of the bidentate silane comparable to that of the attachment points on the substrate.
Claim 26
Dependent Claim
52 words
An improved support comprising a silica substrate and bidentate silane attached to the substrate, the bidentate silane containing at least two silicon atoms bridged by certain groups, so arranged that at least a seven membered ring systems is formed to have the structure: ##STR9## where Y=--O-- or --CH 2 CH 2 --.
Claim 27
Dependent Claim
52 words
An improved support comprising a silica substrate and bidentate silane attached to the substrate, the bidentate silane containing at least two silicon atoms bridged by certain groups, so arranged that at least a seven membered ring systems is formed to have the structure: ##STR9## where Y=--O-- or --CH 2 CH 2 --.
Claim 28
Dependent Claim
24 words
The support set forth in claim 25 which is made by reacting a bidentate silane reagent with the substrate which contains reactive surface groups.
Claim 29
Dependent Claim
16 words
The support set forth in claim 26 wherein the reactive surface groups include --OH or --Cl.
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) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |