US4716051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnation of concrete in depth
Assignee: Huels AG
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Filing: 1985-11-26
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Granted: 1987-12-29
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Expires: 2005-11-26
Abstract
Abstract Solvent-free alkyl trialkoxy-silanes whose alkyl groups have 2 to 8 carbon atoms and whose alkoxy groups have 1 or 2 carbon atoms are used for the in-depth hydrophobic impregnation of concrete. Propyl and isobutyl trialkoxy-silanes display an especially deeply penetrating hydrophobizing action which is greater than that of solutions of these silanes.
Inventors
- 👤 Karl-Martin Rodder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:24
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C04B41/60; C04B41/61; C04B41/62; C04B41/64
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
47 words
A method for hydrophobizing depth-impregnation of a set heavy concrete comprising treating at least one surface of the set heavy concrete with a solvent free alkyl trialkoxysilane wherein the alkyl group has 3 to 8 carbon atoms and the alkoxy group has 1 or 2 carbon atoms.
Claim 2
Independent Claim
47 words
A method for hydrophobizing depth-impregnation of a set heavy concrete comprising treating at least one surface of the set heavy concrete with a solvent free alkyl trialkoxysilane wherein the alkyl group has 3 to 8 carbon atoms and the alkoxy group has 1 or 2 carbon atoms.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the alkyl trialkoxysilane is propyl trialkoxysilane.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the alkyl trialkoxysilane is isobutyl trialkoxysilane.
Claim 5
Dependent Claim
12 words
The method of claim 2 wherein the alkyl trialkoxysilane is propyl trimethoxysilane.
Claim 6
Dependent Claim
12 words
The method of claim 3 wherein the alkyl trialkoxysilane is isobutyl trimethoxysilane.
Claim 7
Dependent Claim
41 words
The method of claim 1 wherein the alkyl trialkoxysilane is selected from the group consisting of propyl triethoxysilane, isopropyl trimethoxysilane, isopropyl triethoxysilane, butyl trimethoxysilane, butyl triethoxysilane, sec butyl trimethoxy silane, sec butyl triethoxy silane, tert-butyl trimethoxy silane and tert-butyl triethoxy silane.
Claim 8
Dependent Claim
11 words
The method of claim 1, wherein the concrete is relatively impermeable.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |