US5528422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror coating
Assignee: KW Muth Co Inc
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Filing: 1993-12-07
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Granted: 1996-06-18
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Expires: 2013-12-07
Abstract
Abstract A mirror coating which possesses properties which are advantageous for the construction of a mirror assembly. The mirror coating has a complex reflective index which is wavelength dependent, and wherein the real component is dominant and the imaginary component is negligible within a predetermined spectral band pass region, and the imaginary component is substantially within a spectral region other than the predetermined spectral band pass region, and wherein the mirror coating exhibits substantially neutral reflected chromaticity as observed with reflected ambient light.
Inventors
- 👤 John K. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:57
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/2661; B60Q1/2665; B60R; B60R1/00; B60R1/02; B60R1/08; B60R1/12; B60R1/1207; G; G02; G02B; G02B5/00; G02B5/08; G02B5/0816; G02B5/0825; G02B5/0833; G02B5/12; G02B5/122; G02B5/124; B60R2001/1223
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
201 words
A mirror coating comprising a recurring succession of two materials which have individually variable thicknesses, and which form a layered interference filter structure, and wherein the mirror coating exhibits substantially neutral reflected chromaticity as observed with reflected visible light, has a peak transmittance of not less than 60% within a predetermined spectral band pass region, has a peak absorbance of not less than 30% within a spectral region other than the predetermined spectral band pass region, and which simultaneously has a luminous reflectance greater than 50% for the visible light striking the mirror coating, and wherein the recurring succession of materials comprises: a first layer of ferric oxide having a thickness dimension of about 145.30 nanometers; a second layer of silicon dioxide having a thickness dimension of about 72.89 nanometers; a third layer of ferric oxide having a thickness dimension of about 54.14 nanometers; a fourth layer of silicon dioxide having a thickness dimension of about 43.74 nanometers; a fifth layer of ferric oxide having a thickness dimension of about 26.0 nanometers; a sixth layer of silicon dioxide having a thickness dimension of about 133.60 nanometers; and a seventh layer of ferric oxide having a thickness dimension of about 85.79 nanometers.
Claim 2
Dependent Claim
201 words
A mirror coating comprising a recurring succession of two materials which have individually variable thicknesses, and which form a layered interference filter structure, and wherein the mirror coating exhibits substantially neutral reflected chromaticity as observed with reflected visible light, has a peak transmittance of not less than 60% within a predetermined spectral band pass region, has a peak absorbance of not less than 30% within a spectral region other than the predetermined spectral band pass region, and which simultaneously has a luminous reflectance greater than 50% for the visible light striking the mirror coating, and wherein the recurring succession of materials comprises: a first layer of ferric oxide having a thickness dimension of about 145.30 nanometers; a second layer of silicon dioxide having a thickness dimension of about 72.89 nanometers; a third layer of ferric oxide having a thickness dimension of about 54.14 nanometers; a fourth layer of silicon dioxide having a thickness dimension of about 43.74 nanometers; a fifth layer of ferric oxide having a thickness dimension of about 26.0 nanometers; a sixth layer of silicon dioxide having a thickness dimension of about 133.60 nanometers; and a seventh layer of ferric oxide having a thickness dimension of about 85.79 nanometers.
Claim 3
Dependent Claim
24 words
A mirror composition as claimed in claim 1, and wherein the thickness dimension of the individual layers may vary by about 2% or less.
Claim 4
Dependent Claim
216 words
A mirror coating comprising a recurring succession of two materials which have individually variable thicknesses, and which form a layered interference filter structure, and wherein the mirror coating exhibits substantially neutral reflected chromaticity as observed with reflected visible light, has a peak transmittance of not less than 60% within a predetermined spectral band pass region, has a peak absorbance of not less than 30% within a spectral region other than the predetermined spectral band pass region, and which simultaneously has a luminous reflectance of greater than 50% for the visible light striking the mirror coating, and wherein the recurring succession of materials comprises: a first layer of ferric oxide having a thickness dimension of about 153.81 nanometers; a second layer of silicon oxide having a thickness dimension of about 60.73 nanometers; a third layer of ferric oxide having a thickness dimension of about 56.13 nanometers; a fourth layer of silicon dioxide having a thickness dimension of about 37.96 nanometers; a fifth layer of ferric oxide having a thickness dimension of about 35.61 nanometers; a sixth layer of silicon dioxide having a thickness dimension of about 131.71 nanometers; a seventh layer of ferric oxide having a thickness dimension of about 89.84 nanometers; and an eighth layer of silicon dioxide having a thickness dimension of about 144.84 nanometers.
Claim 5
Dependent Claim
216 words
A mirror coating comprising a recurring succession of two materials which have individually variable thicknesses, and which form a layered interference filter structure, and wherein the mirror coating exhibits substantially neutral reflected chromaticity as observed with reflected visible light, has a peak transmittance of not less than 60% within a predetermined spectral band pass region, has a peak absorbance of not less than 30% within a spectral region other than the predetermined spectral band pass region, and which simultaneously has a luminous reflectance of greater than 50% for the visible light striking the mirror coating, and wherein the recurring succession of materials comprises: a first layer of ferric oxide having a thickness dimension of about 153.81 nanometers; a second layer of silicon oxide having a thickness dimension of about 60.73 nanometers; a third layer of ferric oxide having a thickness dimension of about 56.13 nanometers; a fourth layer of silicon dioxide having a thickness dimension of about 37.96 nanometers; a fifth layer of ferric oxide having a thickness dimension of about 35.61 nanometers; a sixth layer of silicon dioxide having a thickness dimension of about 131.71 nanometers; a seventh layer of ferric oxide having a thickness dimension of about 89.84 nanometers; and an eighth layer of silicon dioxide having a thickness dimension of about 144.84 nanometers.
Claim 6
Dependent Claim
24 words
A mirror composition as claimed in claim 3, and wherein the thickness dimension of the individual layers may vary by about 2% or less.
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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) | 1999-06-18 | 1999-12-18 | 2000-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-18 | 2003-12-18 | 2004-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-18 | 2007-12-18 | 2008-06-18 | $7700.00 | Window Closed / Lapsed |