US3900634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glazing panel with conductive strips
Assignee: AGC Glass Europe SA
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Filing: 1973-07-12
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Granted: 1975-08-19
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Expires: 1993-07-12
Abstract
Abstract An electrically heatable transparent glazing panel composed of a transparent glass substrate is provided with at least one electrically conductive coating strip by applying onto the substrate a coating composition composed of a suspension or paste incorporating metal particles and intermixed glass particles, at least some of which are of a glass having a softening point lower than that of the glass of the substrate, substantially all of which particles are less than 5 microns in size, and subesquently firing the applied composition. In the composition, the proportion of metal particles is sufficient to render the resulting coating electrically conductive.
Inventors
- 👤 Emile Plumat
- 👤 Pierre Demoulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:32
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; B; B41; B41M; B41M1/00; B41M1/12; B41M1/26; B41M1/34; H05B2203/00; H05B2203/017; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24909; Y10T428/24926
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
182 words
IN A METHOD OF MANUFACTURING AN ELECTRICALLY HEATABLE TRANSPARENT GLAZING PANEL BY PROVIDING A TRANSPARENT GLASS SUBSTRATE WITH AT LEAST ONE ELECTRIALLY CONDUCTIVE COATING STRIP IN WHICH HEAT CAN BE GENERATED BY THE JOULE EFFECT, THE IMPROVEMENT COMPRISING: APPLYING ONTO SAID SUBSTRATE, TO FORM AT LEAST ONE SUCH STRIP, A COATING COMPOSITION COMPOSED OF A SUSPENSION OR PASTE INCORPORATING ELECTRICALLY CONDUCTIVE METAL PARTICLES SUBSTANTIALLY ALL OF WHICH ARE BELOW 5 MICRONS IN SIZE, INTERMIXED WITH GLASS PARTICLES, THE GLASS PARTICLES BEING COMPOSED OF INTERMIXED PARTICLES OF LEAD BOROSILICATE GLASSES OF DIFFERENT SOFTENING POINTS, AT LEAST THE LOWER ONE OF WHICH SOFTENING POINTS IS LOWER THAN THAT OF THE GLASS COMPOSING SAID SUBSTRATE, SAND SUBSTANTIALLY ALL OF WHICH GLASS PARTICLES ARE BELOW 5 MICRONS IN SIZE: AND SUBSEQUENTLY FIRING IN SUCH APPLIED COMPOSITION TO CAUSE AT LEAST ONE OF SUCH GLASSES WHICH HAS SUCH A LOWER SOFTENING POINT TO SERVE AS A BINDER FOR THE METAL PARTICLES: AND WHEREIN THE METAL PARTICLES ARE PRESENT IN THE COMPOSITION IN SUFFICIENT PROPORTION IN RELATION TO THE GLASS PARTICLES TO RENDER THE COATING STRIP ELECRTICALLY CONDUCTIVE.
Claim 2
Dependent Claim
182 words
IN A METHOD OF MANUFACTURING AN ELECTRICALLY HEATABLE TRANSPARENT GLAZING PANEL BY PROVIDING A TRANSPARENT GLASS SUBSTRATE WITH AT LEAST ONE ELECTRIALLY CONDUCTIVE COATING STRIP IN WHICH HEAT CAN BE GENERATED BY THE JOULE EFFECT, THE IMPROVEMENT COMPRISING: APPLYING ONTO SAID SUBSTRATE, TO FORM AT LEAST ONE SUCH STRIP, A COATING COMPOSITION COMPOSED OF A SUSPENSION OR PASTE INCORPORATING ELECTRICALLY CONDUCTIVE METAL PARTICLES SUBSTANTIALLY ALL OF WHICH ARE BELOW 5 MICRONS IN SIZE, INTERMIXED WITH GLASS PARTICLES, THE GLASS PARTICLES BEING COMPOSED OF INTERMIXED PARTICLES OF LEAD BOROSILICATE GLASSES OF DIFFERENT SOFTENING POINTS, AT LEAST THE LOWER ONE OF WHICH SOFTENING POINTS IS LOWER THAN THAT OF THE GLASS COMPOSING SAID SUBSTRATE, SAND SUBSTANTIALLY ALL OF WHICH GLASS PARTICLES ARE BELOW 5 MICRONS IN SIZE: AND SUBSEQUENTLY FIRING IN SUCH APPLIED COMPOSITION TO CAUSE AT LEAST ONE OF SUCH GLASSES WHICH HAS SUCH A LOWER SOFTENING POINT TO SERVE AS A BINDER FOR THE METAL PARTICLES: AND WHEREIN THE METAL PARTICLES ARE PRESENT IN THE COMPOSITION IN SUFFICIENT PROPORTION IN RELATION TO THE GLASS PARTICLES TO RENDER THE COATING STRIP ELECRTICALLY CONDUCTIVE.
Claim 3
Dependent Claim
22 words
A method as defined in claim 1 wherein the glass particles have substantially the same average grain size as the metal particles.
Claim 4
Dependent Claim
35 words
A method as defined in claim 1 wherein at least 10%, by weight, of the glass having the higher softening point is constituted by oxides of aluminum and titanium, or of aluminum, titanium and zirconium.
Claim 5
Dependent Claim
36 words
A method as defined in claim 1 wherein the glass having the higher softening point comprises oxides of aluminum, titanium, zirconium and cadmium in an aggregate proportion of at least 10%, by weight, of such glass.
Claim 6
Dependent Claim
26 words
A method as defined in claim 1 wherein said metal particles constitute at least 40% of the total aggregate weight of metal particles and glass particles.
Claim 7
Dependent Claim
104 words
IN A TRANSPARENT GLAZING PANEL COMPOSED OF A GLASS SUBSTRATE CARRING AT LEAST ONE ATTACHED ELECTRICALLY CONDUCTIVE COATING STRIP IN WHICH HEAT CAN BE GENERATED BY THE JOULE EFFECT, THE IMPROVEMENT WHEREIN SAID STRIP COMPRISES ELECTRICALLY CONDUCTIVE METAL PARTICLES TOGETHER WITH INTERMIXED LEAD BOROSILICATE GLASSES OF AT LEAST TWO DIFFERENT SOFTENING POINTS AT LEAST THE LOWER SOFTENING POINT GLASS SERVING AS A BINDER FOR SAID METAL PARTICLES, SUBSTANTIALLY ALL OF THE METAL PARTICLES AR BELOW 5 MICRONS IN SIZE AND AT LEAST THE HIGHER SOFTENING POINT GLASS IS PRESENT IN THE FORM OF PARTICLES SUBSTANTIALLY ALL OF WHICH ARE BELOW 5 MICRONS IN SIZE.
Claim 8
Dependent Claim
104 words
IN A TRANSPARENT GLAZING PANEL COMPOSED OF A GLASS SUBSTRATE CARRING AT LEAST ONE ATTACHED ELECTRICALLY CONDUCTIVE COATING STRIP IN WHICH HEAT CAN BE GENERATED BY THE JOULE EFFECT, THE IMPROVEMENT WHEREIN SAID STRIP COMPRISES ELECTRICALLY CONDUCTIVE METAL PARTICLES TOGETHER WITH INTERMIXED LEAD BOROSILICATE GLASSES OF AT LEAST TWO DIFFERENT SOFTENING POINTS AT LEAST THE LOWER SOFTENING POINT GLASS SERVING AS A BINDER FOR SAID METAL PARTICLES, SUBSTANTIALLY ALL OF THE METAL PARTICLES AR BELOW 5 MICRONS IN SIZE AND AT LEAST THE HIGHER SOFTENING POINT GLASS IS PRESENT IN THE FORM OF PARTICLES SUBSTANTIALLY ALL OF WHICH ARE BELOW 5 MICRONS IN SIZE.
Claim 9
Dependent Claim
35 words
A panel as defined in claim 6 wherein at least 10%, by weight, of the glass having the higher softening point is constituted by oxides of aluminum and titanium or of aluminum, titanium, and zirconium.
Claim 10
Dependent Claim
36 words
A panel as defined in claim 6 wherein the glass having the higher softening point comprises oxides of aluminum, titanium, zirconium and cadmium in an aggregate proportion of at least 10%, by weight, of such glass.
Claim 11
Dependent Claim
31 words
A panel as defined in claim 6 wherein said metal particles are silver particles and comprise at least 40%, by weight, of the aggregate weight of the silver and glass particles.
Claim 12
Dependent Claim
51 words
A panel as definEd in claim 6 wherein said metal particles are silver particles and comprise less than 60% by weight of the total of silver particles and glass particles, and further comprising a coating covering at least part of said strip and comprising at least 60%, by weight, silver particles.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |