US3887788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation free mirror
Assignee: Seibel and Seibel Enterprises
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Filing: 1973-06-26
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Granted: 1975-06-03
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Expires: 1993-06-26
Abstract
Abstract An anti-condensation device for mirrors comprising a printed circuit board heating element and a means for mounting said printed circuit board heating element on the rear surface of the mirror is described. The mirror assembly herein provided with said heating element maintains the mirror viewing surface free from moisture condensation. In one embodiment of the invention the temperature of the mirror is allowed to increase at the same rate as the ambient temperature and does not require a temperature controller. In another embodiment two heat generating paths are employed to provide for faster warmup and extended life for the temperature controller. The printed circuit heating element may be of rigid composition board or flexible mylar construction.
Inventors
- 👤 Richard Roy Seibel
- 👤 Robert Rhea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:32
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; H05B3/845; A; A47; A47G; A47G1/00; A47G1/02; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/275
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A condensation free mirror assembly comprising a transparent plate, a light reflective coating on one side of said plate, an electrically energizeable heating element consisting of a printed circuit board containing a ground path surrounding the perimeter of said board, a single continuous etched path of uniform thickness of a conductor material selected from the group consisting of copper, aluminum and Nichrome, a means for mounting said heating element to said transparent plate, a means for supplying electrical power to said heating element whereby electrical power can be transmitted to said heating element from said electrical power means thereby energizing said heating element whereby said plate is heated.
Claim 2
Dependent Claim
108 words
A condensation free mirror assembly comprising a transparent plate, a light reflective coating on one side of said plate, an electrically energizeable heating element consisting of a printed circuit board containing a ground path surrounding the perimeter of said board, a single continuous etched path of uniform thickness of a conductor material selected from the group consisting of copper, aluminum and Nichrome, a means for mounting said heating element to said transparent plate, a means for supplying electrical power to said heating element whereby electrical power can be transmitted to said heating element from said electrical power means thereby energizing said heating element whereby said plate is heated.
Claim 3
Dependent Claim
83 words
A CONDENSATION FREE MIRROR ASSEMBLY COMPRISING A TRANSPARENT PLATE, A LIGHT REFLECTIVE COATING ON ONE SIDE OF SAID PLATE, AN ELECTRICALLY ENERGIZEABLE HEATING ELEMENT CONSISTING OF A PRINTED CIRCUIT BOARD CONTAINING A GROUND PATH SURROUNDING THE PERIMETER OF SAID BOARD, A SINGLE CONTINUOUS ETCHED PATH OF UNIFORM THICKNESS OF A CONDUCTOR MATERIAL SELECTED FROM THE GROUP CONSISTING OF COPPER, ALUMINUM AND NICHROME, A MEANS FOR MOUNTING SAID HEATING ELEMENT TO SAID TRANSPARENT PLATE, A MEANS FOR SUPPLYING ELECTRICAL POWDER TO SAID HEATING ELEMENT
Claim 4
Dependent Claim
83 words
A CONDENSATION FREE MIRROR ASSEMBLY COMPRISING A TRANSPARENT PLATE, A LIGHT REFLECTIVE COATING ON ONE SIDE OF SAID PLATE, AN ELECTRICALLY ENERGIZEABLE HEATING ELEMENT CONSISTING OF A PRINTED CIRCUIT BOARD CONTAINING A GROUND PATH SURROUNDING THE PERIMETER OF SAID BOARD, A SINGLE CONTINUOUS ETCHED PATH OF UNIFORM THICKNESS OF A CONDUCTOR MATERIAL SELECTED FROM THE GROUP CONSISTING OF COPPER, ALUMINUM AND NICHROME, A MEANS FOR MOUNTING SAID HEATING ELEMENT TO SAID TRANSPARENT PLATE, A MEANS FOR SUPPLYING ELECTRICAL POWDER TO SAID HEATING ELEMENT
Claim 5
Dependent Claim
47 words
The condensation free mirror assembly of claim 1 wherein said printed circuit board heating element additionally contains an aperture through which a thermal fuse suitably protrudes and contacts said plate thereby providing a means for limiting the temperature of said plate below a maximum predetermined safe level.
Claim 6
Dependent Claim
30 words
The condensation free mirror assembly of claim 1 wherein said means for mounting said heating element comprises attaching said heating element to said transparent plate with a pressure sensitive adhesive.
Claim 7
Dependent Claim
154 words
A condensation free mirror assembly comprising a transparent plate, a light reflective coating on one side of said plate, an electrically energizeable heating element consisting of a printed circuit board containing a ground path surrounding the perimeter of said board, a conductor path of high resistance consisting of a continuous etched path of uniform thickness of a conducting material selected from the group consisting of copper, aluminum and Nichrome, a conductor path of low resistance consisting of a continuous etched path of uniform thickness of a conductor material selected from the group consisting of copper, aluminum and Nichrome, a temperature control means electrically connected between said conductor paths, a means for mounting said heating element to said transparent plate, a means for supplying electrical power to said heating element whereby electrical power can be transmitted to said heating element from said electrical power means, thereby energizing said heating element, whereby said plate is heated.
Claim 8
Dependent Claim
154 words
A condensation free mirror assembly comprising a transparent plate, a light reflective coating on one side of said plate, an electrically energizeable heating element consisting of a printed circuit board containing a ground path surrounding the perimeter of said board, a conductor path of high resistance consisting of a continuous etched path of uniform thickness of a conducting material selected from the group consisting of copper, aluminum and Nichrome, a conductor path of low resistance consisting of a continuous etched path of uniform thickness of a conductor material selected from the group consisting of copper, aluminum and Nichrome, a temperature control means electrically connected between said conductor paths, a means for mounting said heating element to said transparent plate, a means for supplying electrical power to said heating element whereby electrical power can be transmitted to said heating element from said electrical power means, thereby energizing said heating element, whereby said plate is heated.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |