US4971848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heatable panels
Assignee: Boussois SA
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Filing: 1982-01-08
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Granted: 1990-11-20
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Expires: 2002-01-08
Abstract
Abstract An electrically heatable transparent panel (1) comprises spaced electrically conductive bus strips (2, 3) interconnected by electrically conductive heating means (4) deposited on a substrate (5) of glazing material. To reduce the visual obtrusiveness of the heating means (4) as compared with linear heating elements as conventionally used in heatable rear windows or motor vehicles, and for other purposes, the heating means comprises electrically conductive enamel deposited meshwise on the substrate, the interstices of the mesh having a maximum dimension of 10 mm or less, and substantially no individual line of mesh has a width greater than 0.5 mm.
Inventors
- 👤 Jacques Ruelle
- 👤 Henry Caty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:36
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; H05B2203/00; H05B2203/016; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/24917
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
75 words
An electrically heatable transparent panel constituting a vehicle window comprising spaced electrically conductive bus strips interconnected by electrically conductive heating means deposited on a substrate of glazing material, characterised in that said heating means (4) comprises electrically conductive enamel deposited meshwise on said substrate the interstices of such conductive mesh having a maximum dimension of 6 mm or less, substantially no individual line of such conductive mesh (4) being greater than 0.3 mm in width.
Claim 2
Dependent Claim
75 words
An electrically heatable transparent panel constituting a vehicle window comprising spaced electrically conductive bus strips interconnected by electrically conductive heating means deposited on a substrate of glazing material, characterised in that said heating means (4) comprises electrically conductive enamel deposited meshwise on said substrate the interstices of such conductive mesh having a maximum dimension of 6 mm or less, substantially no individual line of such conductive mesh (4) being greater than 0.3 mm in width.
Claim 3
Dependent Claim
27 words
A panel according to claim 1, characterised in that substantially all the interstices of such conductive mesh (4) have a smallest dimension of at least 1.5 mm.
Claim 4
Dependent Claim
22 words
A panel according to claim 1, characterised in that substantially all said interstices have dimensions of between 2 mm and 6 mm.
Claim 5
Dependent Claim
36 words
A panel according to claim 1, characterised in that such conductive mesh (4) is so deposited as to cover no more than 20% of the area of the panel enclosed by the boundary of such mesh.
Claim 6
Dependent Claim
23 words
A panel according to claim 1, characterised in that the conductive mesh (4) is deposited in a hexagonal, rectangular or diamond mesh pattern.
Claim 7
Dependent Claim
17 words
A panel according to claim 1, characterised in that said mesh-wise deposits constitute heating elements (14, 15).
Claim 8
Dependent Claim
33 words
A panel according to claim 1, characterised in that the conductive enamel of said mesh-wise deposited heating means (4) contains a base metal or a mixture of base metals as sole conductive component.
Claim 9
Dependent Claim
24 words
A panel according to claim 7, characterised in that the or at least one said base metal is selected from: aluminium, nickel and copper.
Claim 10
Dependent Claim
27 words
A panel according to claim 1, characterised in that at least one mesh line of the mesh-wise deposited heating means (33) is interrupted by a discontinuity (43).
Claim 11
Dependent Claim
54 words
A panel according to claim 9, characterised in that said bus strips (36, 39) converge towards one edge of the panel so that the distance between them is reduced in that edge region and in that at least one mesh line of the mesh-wise deposited heating means (33) is interrupted (43) in such region.
Claim 12
Dependent Claim
24 words
A panel according to claim 1, characterised in that said heating means (4) includes a base metal electrolytically deposited onto said mesh-wise deposited material.
Claim 13
Dependent Claim
88 words
A panel according to claim 1, characterised in that each said bus strip (12, 45) comprises electrically conductive material deposited on the substrate over the area to be occupied by that bus strip in a pattern (13 or 47, 48) such that the conductive material extends continuously along the length of the area of the strip in the form of bus lines leaving bare interstices (13a, 55) distributed along that area between said bus lines, and an electrolytically deposited base metal overcoating deposited only on said conductive material.
Claim 14
Dependent Claim
20 words
A panel according to claim 11 or 12, characterised in that said electrolytically deposited base metal is copper and/or nickel.
Claim 15
Dependent Claim
33 words
A panel according to claim 12, characterised in that at least some of the mesh lines (51) are directly connected to less than all of said bus lines of each said bus strip.
Claim 16
Dependent Claim
44 words
A panel according to claim 14, characterized in that said conductive mesh lines constitute at least one heating element, constituted by such conductive mesh, which is directly electrically connected to less than all of said bus lines of at least one said bus strip.
Claim 17
Dependent Claim
122 words
A panel according to claim 15, characterized in that said at least one bus strip comprises a conductive terminal portion located adjacent one end of said bus lines of the associated bus strip for connection to a current supply wire, at least one of said bus lines of said at least one bus strip is interrupted at a location between the region where said at least one bus strip is connected to said heating element and said terminal portion, and said at least one bus strip further comprises a transverse bus line connecting said at least one bus line to one said bus line which is not interrupted at a location at the opposite side of said region from said terminal portion.
Claim 18
Dependent Claim
40 words
A panel according to claim 1 wherein said conductive mesh is formed to present a plurality of conductive paths extending between said bus strips and conductively interconnected transversely of said paths at a plurality of locations between said bus strips.
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) | 1993-11-19 | 1994-05-21 | 1994-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-19 | 1998-05-21 | 1998-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-19 | 2002-05-21 | 2002-11-20 | $7700.00 | Window Closed / Lapsed |