Patent US4838673A successfully refreshed from Google Patents.
US4838673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarized lens and method of making the same
Assignee: RLI VISION CORP
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Filing: 1987-04-27
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Granted: 1989-06-13
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Expires: 2007-04-27
Abstract
Abstract A sunglass lens has two mounds of ground mineral glass laminated together with a polarization film to form a single lens having inner and outer surfaces. The inner surface is provided with an anti-reflectant coating and the outer surface is provided with a bigradient coating. A process for making the lens is also disclosed in which bigradient material is vaporized in a vacuum coating machine.
Inventors
- 👤 Charles Richards
- 👤 Kazuhiro Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:44
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/10; G02C7/12; B; B29; B29D; B29D11/00; B29D11/00865
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
70 words
A sunglass lens comprising, two layers of ground mineral glass laminated together with a polarized film between the two glass layers, thereby forming a single lens having inner and outer surfaces, an anti-reflectant coating adhered to the inner surface of the lens, and a bigradient coating adhered to the outer surface of the lens on upper and lower portions thereof, wherein a horizontal axis of the lens is substantilly uncoated.
Claim 2
Dependent Claim
70 words
A sunglass lens comprising, two layers of ground mineral glass laminated together with a polarized film between the two glass layers, thereby forming a single lens having inner and outer surfaces, an anti-reflectant coating adhered to the inner surface of the lens, and a bigradient coating adhered to the outer surface of the lens on upper and lower portions thereof, wherein a horizontal axis of the lens is substantilly uncoated.
Claim 3
Dependent Claim
14 words
The lens of claim 1 wherein the bigradient coating is made of silicon dioxide.
Claim 4
Dependent Claim
15 words
The lens of claim 2 wherein the bigradient coating is made of metal oxide chrome.
Claim 5
Independent Claim
69 words
A method of manufacturing a sunglass lens comprising, grinding and polishing two mounds of mineral glass, laminating the two mounds together with a polarization film disposed therebetween thereby forming a single glass lens having inner and outer surfaces, coating the inner surface of the lens with an anti-reflectant coating, cutting the lens to a desired precision fit, and coating the outer surface of the lens with a bigradient coating.
Claim 6
Independent Claim
69 words
A method of manufacturing a sunglass lens comprising, grinding and polishing two mounds of mineral glass, laminating the two mounds together with a polarization film disposed therebetween thereby forming a single glass lens having inner and outer surfaces, coating the inner surface of the lens with an anti-reflectant coating, cutting the lens to a desired precision fit, and coating the outer surface of the lens with a bigradient coating.
Claim 7
Dependent Claim
25 words
The method of claim 4 further comprising, cleaning the lens in an ultrasonic cleaning process prior to coating the outer surface with a bigradient coating.
Claim 8
Dependent Claim
18 words
The method of claim 5 wherein the cleaning step comprises, sequentially passing the lens through eight different tubs.
Claim 9
Dependent Claim
65 words
The method of claim 6 wherein the first two tubs contain a synthetic fluid kept at approximately 50 degrees C., the third tub contains regular tap water kept at approximately 19 degrees C., the fourth tub contains distilled water kept at approximately 19 degrees C., the fifth, sixth and seventh tubs contain isopropyl alcohol kept under 15 degrees C., and the eighth tub contains flon.
Claim 10
Dependent Claim
70 words
The method of claim 4 wherein the coating of the outer surface comprises, aligning horizontal axes of two such lenses (left and right) with aligning means, vaporizing bigradient coating material with vaporizing means, wherein the vaporizing means is disposed beneath the aligning means, blocking vaporized material along the horizontal axis of each lens, and cooling an area around the aligning means to prevent the temperature from exceeding 50 degrees C.
Claim 11
Dependent Claim
42 words
The method of claim 8 wherein the aligning means comprises an inner dome which carries at least one pair of said lenses, wherein the inner dome is provided with reference lines for forming right angles with the horizontal axis of each lens.
Claim 12
Dependent Claim
26 words
The method of claim 8 wherein the bigradient materials are vaporized in a vacuum vaporization dome having a pressure maintained at less than 6×10 -3 PA.
Claim 13
Dependent Claim
18 words
The method of claim 8 wherein the cooling means comprises a cooling element connected to the inner dome.
Claim 14
Dependent Claim
12 words
A lens which is a product of the method of claim 8.
Claim 15
Dependent Claim
74 words
A sunglass lens made by the method of manufacturing a sunglass lens comprising, grinding and polishing two mounds of mineral glass, laminating the two mounds together with a polarization film disposed therebetween thereby forming a single glass lens having inner and outer surfaces, coating the inner surface of the lens with an anti-reflectant coating, cutting the lens to a desired precision fit, and coating the outer surface of the lens with a bigradient coating.
Claim 16
Dependent Claim
74 words
A sunglass lens made by the method of manufacturing a sunglass lens comprising, grinding and polishing two mounds of mineral glass, laminating the two mounds together with a polarization film disposed therebetween thereby forming a single glass lens having inner and outer surfaces, coating the inner surface of the lens with an anti-reflectant coating, cutting the lens to a desired precision fit, and coating the outer surface of the lens with a bigradient coating.
Claim 17
Dependent Claim
29 words
The lens made by the method of claim 13 further comprising, cleaning the lens in an ultrasonic cleaning process prior to coating the outer surface with a bigradient coating.
Claim 18
Dependent Claim
22 words
The lens made by the method of claim 14 wherein the cleaning step comprises, sequentially passing the lens through eight different tubs.
Claim 19
Dependent Claim
69 words
The lens made by the method of claim 15 wherein the first two tubs contain a synthetic fluid kept at approximately 50 degrees C., the third tub contains regular tap water kept at approximately 19 degrees C., the fourth tub contains distilled water kept at approximately 19 degrees C., the fifth, sixth and seventh tubs contain isopropyl alcohol kept under 15 degrees C., and the eighth tub contains flon.
Claim 20
Dependent Claim
74 words
The lens made by the method of claim 13 wherein the coating of the outer surface comprises, aligning horizontal axes of two such lenses (left and right) with aligning means, vaporizing bigradient coating material with vaporizing means, wherein the vaporizing means is disposed beneath the aligning means, blocking vaporized material along the horizontal axis of each lens, and cooling an area around the aligning means to prevent the temperature from exceeding 50 degrees C.
Claim 21
Dependent Claim
46 words
The lens made by the method of claim 17 wherein the aligning means comprises an inner dome which carries at least one pair of said lenses, wherein the inner dome is provided with reference lines for forming right angles with the horizontal axis of each lens.
Claim 22
Dependent Claim
30 words
The lens made by the method of claim 17 wherein the bigradient materials are vaporized in a vacuum vaporization dome having a pressure maintained at less than 6×10 -3 PA.
Claim 23
Dependent Claim
22 words
The lens made by the method of claim 17 wherein the cooling means comprises a cooling element connected to the inner dome.
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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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |