Patent US4655811A successfully refreshed from Google Patents.
US4655811A
Expired / Lapsed
US
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Conductive coating treatment of glass sheet bending process
Assignee: Magna Donnelly Corp
•
Filing: 1985-12-23
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Granted: 1987-04-07
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Expires: 2005-12-23
Abstract
Abstract The specification discloses a method for producing a curved glass member having a transparent, electroconductive coating by first coating the glass flat with indium-tin oxide, followed by coating that film with a layer of carbonaceous material and covering that layer with a mating piece of glass while the two pieces of glass are bent in a bending oven.
Inventors
- 👤 Lowell E. Bitter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:02
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10165; B32B17/10174; B32B17/10009; B32B17/10018; C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/025; C03B23/0252; C03B23/027; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3441
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
59 words
A method for forming a curved, electrically conductive glass member comprising: coating a flat piece of glass with an indium-tin oxide coating; applying a layer of carbonaceous material on top of said indium-tin oxide coating; bending said glass member with heat while minimizing exposure of said carbonaceous layer to oxygen, whereby crazing of said indium-tin oxide coating is minimized.
Claim 2
Independent Claim
59 words
A method for forming a curved, electrically conductive glass member comprising: coating a flat piece of glass with an indium-tin oxide coating; applying a layer of carbonaceous material on top of said indium-tin oxide coating; bending said glass member with heat while minimizing exposure of said carbonaceous layer to oxygen, whereby crazing of said indium-tin oxide coating is minimized.
Claim 3
Dependent Claim
61 words
The method of claim 1 in which said step of minimizing exposure of said carbonaceous layer to oxygen during bending is conducted by covering said carbonaceous layer with a second sheet of glass and bending said first and second sheets of glass together with heat with said indium-tin oxide and carbonaceous layers sandwiched between said first and second sheets of glass.
Claim 4
Dependent Claim
24 words
The method of claim 2 in which said carbonaceous material is applied to a density of approximately 0.6 of a gram per square foot.
Claim 5
Dependent Claim
27 words
The method of claim 3 in which said carbonaceous material is selected from the group consisting of powdered activated charcoal, powdered charcoal, powdered graphite and carbon black.
Claim 6
Dependent Claim
26 words
The method of claim 4 in which said carbonaceous material is incorporated into a paint and is applied to said indium-tin oxide layer in paint form.
Claim 7
Dependent Claim
17 words
The method of claim 4 in which said carbonaceous layer is dusted onto said indium-tin oxide layer.
Claim 8
Dependent Claim
50 words
The method of claim 4 in which said indium-tin oxide layer is applied to an initial light transmittance (T o ) of greater than about 40, said bending step being conducted without any firing of said indium-tin oxide layer in oxygen between said initial application step and said bending step.
Claim 9
Dependent Claim
45 words
The method of claim 4 in which said indium-tin oxide layer is applied on said glass to an initial light transmittance (T o ) of less than about 40; said indium-tin oxide layer being fired in an atmosphere containing oxygen prior to said bending step.
Claim 10
Dependent Claim
20 words
The method of claim 4 in which said curved, electroconductive glass member is made without using a reduction cure step.
Claim 11
Dependent Claim
50 words
The method of claim 3 in which said indium-tin oxide layer is applied to an initial light transmittance (T o ) of greater than about 40, said bending step being conducted without any firing of said indium-tin oxide layer in oxygen between said initial application step and said bending step.
Claim 12
Dependent Claim
45 words
The method of claim 3 in which said indium-tin oxide layer is applied on said glass to an initial light transmittance (T o ) of less than about 40; said indium-tin oxide layer being fired in an atmosphere containing oxygen prior to said bending step.
Claim 13
Dependent Claim
20 words
The method of claim 3 in which said curved, electroconductive glass member is made without using a reduction cure step.
Claim 14
Dependent Claim
50 words
The method of claim 2 in which said indium-tin oxide layer is applied to an initial light transmittance (T o ) of greater than about 40, said bending step being conducted without any firing of said indium-tin oxide layer in oxygen between said initial application step and said bending step.
Claim 15
Dependent Claim
45 words
The method of claim 2 in which said indium-tin oxide layer is applied on said glass to an initial light transmittance (T o ) of less than about 40; said indium-tin oxide layer being fired in an atmosphere containing oxygen prior to said bending step.
Claim 16
Dependent Claim
20 words
The method of claim 2 in which said curved, electroconductive glass member is made without using a reduction cure step.
Claim 17
Dependent Claim
50 words
The method of claim 1 in which said indium-tin oxide layer is applied to an initial light transmittance (T o ) of greater than about 40, said bending step being conducted without any firing of said indium-tin oxide layer in oxygen between said initial application step and said bending step.
Claim 18
Dependent Claim
45 words
The method of claim 1 in which said indium-tin oxide layer is applied on said glass to an initial light transmittance (T o ) of less than about 40; said indium-tin oxide layer being fired in an atmosphere containing oxygen prior to said bending step.
Claim 19
Dependent Claim
20 words
The method of claim 1 in which said curved, electroconductive glass member is made without using a reduction cure step.
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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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |