Patent US4631391A successfully refreshed from Google Patents.
US4631391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heating device, especially for mirrors
Assignee: Stettner and Co
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Filing: 1984-06-21
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Granted: 1986-12-23
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Expires: 2004-06-21
Abstract
Abstract An electrical heating device for a mirror includes a pair of electrically conductive heating lining plates providing for heat distribution on a mirror, and electrical conductors connected to the plates for connecting the plates to a source of power. An insulating layer is disposed between the plates, the insulating layer having openings, and PTC resistor platelettes disposed in the openings and in electrical contact with the pair of plates. One of the plates has a larger area than the insulating layer such that an outer peripheral edge portion of the one plate is spaced outwardly of the outer peripheral edge of the insulating layer, the other of the pair of plates not being larger in area than the insulating layer. The larger of the plates is adapted to be adhered to the backside of a mirror glass for defogging and demisting the mirror.
Inventors
- 👤 Gunter Tiepke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:06
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; B; B60; B60R; B60R1/00; B60R1/02; B60R1/06; B60R1/0602; H05B3/84; H05B3/845
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
An electrical heating device for a mirror comprising a pair of electrically conductive heating lining plates providing for heat distribution on a mirror, electrical conductors connected to said plates for connecting said plates to a source of power, an insulating layer disposed between said plates, said electrical insulating layer having openings, and PTC resistor platelettes disposed in said openings and in electrical contact with said pair of plates, one of said plates having a larger area than said insulation layer such that the entire outer peripheral edge portion of said one plate is spaced outwardly of the outer peripheral edge of said insulating layer the other of said pair of plates not being larger in area than said insulating layer.
Claim 2
Dependent Claim
120 words
An electrical heating device for a mirror comprising a pair of electrically conductive heating lining plates providing for heat distribution on a mirror, electrical conductors connected to said plates for connecting said plates to a source of power, an insulating layer disposed between said plates, said electrical insulating layer having openings, and PTC resistor platelettes disposed in said openings and in electrical contact with said pair of plates, one of said plates having a larger area than said insulation layer such that the entire outer peripheral edge portion of said one plate is spaced outwardly of the outer peripheral edge of said insulating layer the other of said pair of plates not being larger in area than said insulating layer.
Claim 3
Dependent Claim
23 words
An electrical heating device according to claim 1, wherein each of said pair of plates is made of a single piece of material.
Claim 4
Dependent Claim
23 words
An electrical heating device according to claim 1, wherein one of said plates is provided with embossments for receiving said PTC resistor platelettes.
Claim 5
Dependent Claim
158 words
An electrical heating device for a mirror comprising a pair of electrically conductive heating lining plates providing for heat distribution on a mirror, electrical conductors connected to said plates for connecting said plates to a source of power, an insulating layer disposed between said plates, said electrical insulating layer having openings, and PTC resistor platelettes disposed in said openings and in electrical contact with said pair of plates, said insulating layer having a larger area than one of said plates such that the entire outer peripheral edge portion of said one plate is spaced inwardly of the outer edge of said insulation layer, said other plate having a larger area than said insulating layer such than the entire outer peripheral edge portion of said other plate is spaced outwardly of the outer edge of said insulating layer such that the outer peripheral edge portions of said one plate, said insulating layer and said other plate are progressively staggered.
Claim 6
Dependent Claim
158 words
An electrical heating device for a mirror comprising a pair of electrically conductive heating lining plates providing for heat distribution on a mirror, electrical conductors connected to said plates for connecting said plates to a source of power, an insulating layer disposed between said plates, said electrical insulating layer having openings, and PTC resistor platelettes disposed in said openings and in electrical contact with said pair of plates, said insulating layer having a larger area than one of said plates such that the entire outer peripheral edge portion of said one plate is spaced inwardly of the outer edge of said insulation layer, said other plate having a larger area than said insulating layer such than the entire outer peripheral edge portion of said other plate is spaced outwardly of the outer edge of said insulating layer such that the outer peripheral edge portions of said one plate, said insulating layer and said other plate are progressively staggered.
Claim 7
Dependent Claim
131 words
An electrical heating device for a mirror comprising, a pair of electrically conductive heating lining plates providing for heat distribution, one of said plates being adapted to be adhered to the back side of a mirror, electrical conductors connected to said plates for connecting said plates to a source of power, an insulating layer disposed between said plates, said insulating layer having openings, and PTC resistor platelettes disposed in said openings and in electrical contact with said pair of plates, said one plate having a larger area than said insulating layer such that the entire outer peripheral edge portion of said one plate is spaced outwardly of the outer peripheral edge of said insulating layer, the other of said pair of plates not being larger in area than said insulating layer.
Claim 8
Dependent Claim
131 words
An electrical heating device for a mirror comprising, a pair of electrically conductive heating lining plates providing for heat distribution, one of said plates being adapted to be adhered to the back side of a mirror, electrical conductors connected to said plates for connecting said plates to a source of power, an insulating layer disposed between said plates, said insulating layer having openings, and PTC resistor platelettes disposed in said openings and in electrical contact with said pair of plates, said one plate having a larger area than said insulating layer such that the entire outer peripheral edge portion of said one plate is spaced outwardly of the outer peripheral edge of said insulating layer, the other of said pair of plates not being larger in area than said insulating layer.
References Cited (Backward Citations)
US3748439A
Cited
JPS54139140A
Cited
US4242567A
Cited
US4327282A
Cited
US4237366A
Cited
DE2919968A1
Cited
GB2064927A
Cited
US4401885A
Cited
DE3041597A1
Cited
DE3042419A1
Cited
US4426573A
Cited
US4404463A
Cited
DE3147494A1
Cited
US4410790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |