US4764431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for protecting and consolidating stone materials
Assignee: Consiglio Nazionale delle Richerche
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Filing: 1986-02-21
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Granted: 1988-08-16
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Expires: 2006-02-21
Abstract
Abstract The surface of stone materials, of tiles, of cement mixes and articles and structures manufactured therefrom are protected against atmospheric and polluting agents by superficially applying a protecting material consisting of a vinylidene fluoride polymer or copolymer comprising 55-100% by moles of vinylidene fluoride, 0-5% by moles of propene hexafluoride and 0-30% by moles of tetrafluoroethylene. Such polymers or copolymers are applied to the surface to be protected in the form of a solution in volatile solvents.
Inventors
- 👤 Franco Piacenti
- 👤 Adolfo Pasetti
- 👤 Carlo Manganelli Del Fa
- 👤 Giovanni Moggi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/48; C04B41/4838; C04B41/4842; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/4935
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
A process for protecting and consolidating stone materials, marble, sandstone, tiles, cement mixes and articles and structures manufactured therefrom from the degrading action exerted by atmospheric and/or polluting agents, characterized in that an uncured polymeric material consisting of a vinylidene fluoride homopolymer or copolymer is applied to the surface of such materials and manufactured articles and structures, said vinylidene fluoride homopolymer or copolymer containing from about 55 to about 100% by moles of vinylidene fluoride, from 0 to about 30% by moles of tetrafluoroethylene, and from 0 to about 45% by moles of hexafluoropropene.
Claim 2
Dependent Claim
94 words
A process for protecting and consolidating stone materials, marble, sandstone, tiles, cement mixes and articles and structures manufactured therefrom from the degrading action exerted by atmospheric and/or polluting agents, characterized in that an uncured polymeric material consisting of a vinylidene fluoride homopolymer or copolymer is applied to the surface of such materials and manufactured articles and structures, said vinylidene fluoride homopolymer or copolymer containing from about 55 to about 100% by moles of vinylidene fluoride, from 0 to about 30% by moles of tetrafluoroethylene, and from 0 to about 45% by moles of hexafluoropropene.
Claim 3
Dependent Claim
17 words
The process according to claim 1, in which the homopolymer or copolymer is applied as a solution.
Claim 4
Dependent Claim
55 words
Articles and structures manufactured from stone materials, marble, sandstone, tiles, and cement mixes provided with a coat consisting of an uncured polymer or copolymer comprising from about 55 to about 100% by moles of vinylidene fluoride, from 0 to about 45% by moles of hexafluoropropene and from 0 to about 30% by moles of tetrafluoroethylene.
Claim 5
Dependent Claim
55 words
Articles and structures manufactured from stone materials, marble, sandstone, tiles, and cement mixes provided with a coat consisting of an uncured polymer or copolymer comprising from about 55 to about 100% by moles of vinylidene fluoride, from 0 to about 45% by moles of hexafluoropropene and from 0 to about 30% by moles of tetrafluoroethylene.
Claim 6
Dependent Claim
18 words
The process according to claim 2, in which the solvent for the homopolymer or copolymer is a ketone.
Claim 7
Dependent Claim
12 words
The process according to claim 4, in which the solvent is methylethylketone.
Claim 8
Dependent Claim
13 words
The process according to claim 2, in which the solvent is an ester.
Claim 9
Dependent Claim
13 words
The process according to claim 2, in which the ester is methyl acetate.
Claim 10
Dependent Claim
12 words
The process of claim 2 in which the solvent is an ether.
Claim 11
Dependent Claim
12 words
The process according to claim 2, in which the solvent is tetrahydrofuran.
Claim 12
Dependent Claim
23 words
The process of claim 2 in which the solvent for the homopolymer or copolymer has a boiling point not higher than 160° C.
Claim 13
Dependent Claim
23 words
The process of claim 2 in which the solvent for the homopolymer or copolymer has a boiling point not lower than 30° C.
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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |