US3790748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror having electrical heating means
Assignee: AGC Glass Europe SA
•
Filing: 1972-06-09
•
Granted: 1974-02-05
•
Expires: 1992-06-09
Abstract
Abstract A mirror comprising a sheet of chemically tempered glass has a light reflecting coating on one face thereof and an electrically conductive heating element positioned either on the other face of the glass or on a face of a second glass sheet. A layer of electrically insulating material is positioned between the heating element and light reflecting coating and this layer may constitute the sheet of glass, a sheet of plastic, or a space having a gaseous medium therein. The heating element is connectable to a source of electricity and generates heat by the Joule effect. The heating element is in heating relationship to the mirror so that this generated heat is transmitted to the mirror.
Inventors
- 👤 Laethem R Van
- 👤 P Baudin
- 👤 J Hoyois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:10
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; A; A47; A47G; A47G1/00; A47G1/02; B32B17/10045; B32B17/10055; B32B17/10165; B32B17/10174; B32B17/1055; B32B17/10761; F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; G; G02; G02B; G02B7/00; G02B7/18; G02B7/181; G02B7/1815; H; H05; H05B; H05B3/00; H05B3/84; H05B3/845; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
85 words
A mirror comprising a support sheet of glass, a light reflecting coating on a face of said support sheet, a second sheet of glass, an electrically conductive heating element disposed on said second glass sheet in heating relationship to said support sheet, means for connecting said heating element to a source of electricity so that heat is generated by the Joule effect in said heating element, there being a layer of electrically insulating material between said light reflecting coating and said electrically conductive heating element.
Claim 2
Dependent Claim
85 words
A mirror comprising a support sheet of glass, a light reflecting coating on a face of said support sheet, a second sheet of glass, an electrically conductive heating element disposed on said second glass sheet in heating relationship to said support sheet, means for connecting said heating element to a source of electricity so that heat is generated by the Joule effect in said heating element, there being a layer of electrically insulating material between said light reflecting coating and said electrically conductive heating element.
Claim 3
Dependent Claim
18 words
A mirror as claimed in claim 1 wherein said layer of electrically insulating material comprises an organic material.
Claim 4
Dependent Claim
21 words
A mirror as claimed in claim 1 wherein said layer of electrically insulating material comprises a sheet of organic polymeric material.
Claim 5
Dependent Claim
13 words
A mirror as claimed in claim 3 wherein said polymeric material comprises polyvinylbutyral.
Claim 6
Dependent Claim
17 words
A mirror as claimed in claim 1 wherein said support and said second sheet are substantially rigid.
Claim 7
Dependent Claim
23 words
A mirror as claimed in claim 1 wherein said electrically conductive heating element is positioned between said support sheet and said second sheet.
Claim 8
Dependent Claim
26 words
A mirror as claimed in claim 1 wherein said electrically conductive heating element is on the face of said second sheet away from said support sheet.
Claim 9
Dependent Claim
16 words
A mirror as claimed in claim 7 and comprising a protective layer over said heating element.
Claim 10
Dependent Claim
29 words
A mirror as claimed in claim 8 wherein said protective layer comprises a coating of at least one of SiO2 and a sheet of a polymeric material including polyvinylbutyral.
Claim 11
Dependent Claim
21 words
A mirror as claimed in claim 1 wherein said light reFlecting coating is between said support sheet and said heating element.
Claim 12
Dependent Claim
21 words
A mirror as claimed in claim 10 and comprising an opaque layer between said light reflecting coating and said heating element.
Claim 13
Dependent Claim
18 words
A mirror as claimed in claim 1 wherein said support sheet and the light reflecting coating are laminated.
Claim 14
Dependent Claim
36 words
A mirror as claimed in claim 1 wherein said support sheet and said second sheet with their respective light reflecting coating and heating element being spaced, and a gaseous medium in the space between said sheets.
Claim 15
Dependent Claim
23 words
A mirror as claimed in claim 13 and comprising means permanently securing said support sheet and said second sheet together along their edges.
Claim 16
Dependent Claim
22 words
A mirror as claimed in claim 14 wherein said securing means comprises a bonding medium between said sheets at the edges thereof.
Claim 17
Dependent Claim
23 words
A mirror as claimed in claim 13 wherein said securing means comprises a frame within which the edges of said sheets are received.
Claim 18
Dependent Claim
37 words
A mirror as claimed in claim 1 and comprising removeable means around the edtes of said support sheet and said second sheet for binding said sheets together in face-to-face relationship whereby said sheets can be readily separated.
Claim 19
Dependent Claim
75 words
A mirror as claimed in claim 1 wherein said support sheet comprises a sheet of tempered glass having the light reflecting coating on one face thereof, a protective coating overlying said light reflecting coating, a second sheet of glass with said layer of electrically conductive heating element being on a face thereof, and a sheet of plastic material uniting said support sheet and said second sheet between said heating element layer and said protective coating.
Claim 20
Dependent Claim
16 words
A mirror as claimed in claim 1 wherein said support is of chemically tempered float glass.
Claim 21
Dependent Claim
32 words
A mirror as claimed in claim 1 wherein said electrically conductive heating element comprises a coating of one selected from the group of gold, copper, silver, aluminum, chromium, SnO2, In2O3 and graphite.
References Cited (Backward Citations)
US2015816A
Cited
US3052787A
Cited
US3160736A
Cited
US3272900A
Cited
US3299253A
Cited
US3530275A
Cited
US3597586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |