US5004503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distribution of powder for making coated glass
Assignee: Saint Gobain Vitrage SA
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Filing: 1983-08-02
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Granted: 1991-04-02
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Expires: 2003-08-02
Abstract
Abstract A process for the distribution of a powder for coating glass, whereby a regular, homogeneous coating of uniform thickness is formed, wherein the powder is converted into a metal oxide or oxides upon contact with hot glass, which comprises spraying a powder onto said glass, wherein said powder comprises: (a) a composition which is capable of being converted into a metal oxide or oxides upon contact with hot glass, and (b) a water-repellent, anhydrous product having a base of finely-divided slica. The product with a base of finely-divided silica is added in the amount of about 0.5 to 5%, by weight, based on the total powder weight.
Inventors
- 👤 Hideo Kawahara
- 👤 Nobuhiro Sakata
- 👤 Jean-Claude Coulon
- 👤 Patrick Lovera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:36
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/17
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
A powder mixture for coating glass with homogenous coatings of uniform thickness which comprises: (a) a composition which comprises dibutyltin oxide, dibutyltin difluoride, the acetylacetonates of Fe, Cr, Co, Ti, Al, Sn, Cu or In, or a mixture thereof, or other compound of the metals Fe, Cr, In, Co, Ti, Al, Sn and Cu or a mixture thereof, which are capable of being converted into a metal oxide or oxides upon contact with hot glass, and (b) a water-repellent, anhydrous product having a base of finely-divided silica, wherein the proportion of product (b) added is between about 0.5 to 5%, based on the total weight of the powder.
Claim 2
Dependent Claim
108 words
A powder mixture for coating glass with homogenous coatings of uniform thickness which comprises: (a) a composition which comprises dibutyltin oxide, dibutyltin difluoride, the acetylacetonates of Fe, Cr, Co, Ti, Al, Sn, Cu or In, or a mixture thereof, or other compound of the metals Fe, Cr, In, Co, Ti, Al, Sn and Cu or a mixture thereof, which are capable of being converted into a metal oxide or oxides upon contact with hot glass, and (b) a water-repellent, anhydrous product having a base of finely-divided silica, wherein the proportion of product (b) added is between about 0.5 to 5%, based on the total weight of the powder.
Claim 3
Dependent Claim
15 words
The powder mixture of claim 1, wherein the product (b) comprises at least 90% silica.
Claim 4
Dependent Claim
28 words
The powder mixture of claim 1, wherein the product (b) has an average granulometry of about 1/1000 of the average granulometry of the composition (a) in said powder.
Claim 5
Dependent Claim
44 words
The powder mixture of claim 3, wherein the average granulometry of the product (b) is in the range of 7 to 20 nanometers, and the average granulometry of the composition (a) in said powder is in the range of 1 to several dozen microns.
Claim 6
Dependent Claim
23 words
The powder mixture of claim 4, wherein the average granulometry of the product (b) is in the range of 10 to 15 nanometers.
Claim 7
Dependent Claim
18 words
The powder mixture of claim 4, wherein the product (b) is finely-divided silica containing at least 98% silica.
Claim 8
Dependent Claim
27 words
The powder mixture of claim 1, wherein the proportion of product (b) added is between about 1 and 2%, based on the total weight of the powder.
Claim 9
Dependent Claim
34 words
The powder mixture of claim 1, wherein the composition (a) is dibutyltin difluoride, and product (b) is a finely-divided, water-repellent silica, wherein said water-repellent silica comprises 2% by weight of the total powder weight.
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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) | 1994-04-01 | 1994-10-01 | 1995-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-01 | 1998-10-01 | 1999-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-01 | 2002-10-01 | 2003-04-02 | $7700.00 | Window Closed / Lapsed |