US3571489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent substrate having graded optical density conductors thereon
Assignee: MAX LEVY AND CO Inc
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Filing: 1966-12-23
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Granted: 1971-03-16
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Expires: 1986-12-23
Abstract
Abstract Electrical conductors in an array which are present in transparent insulating material such as glass and transparent plastic cause diffraction which interferes with viewing an image. By grading the optical density of the conductors from a maximum near the center to a minimum remote from the center of each conductor, diffraction is markedly reduced.
Inventors
- 👤 Edgar B Coale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:53
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/42; G02B27/4233; H; H05; H05B; H05B3/00; H05B3/84
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A transparent panel consisting of a dielectric transparent substrate, and a matrix of electrical conductors supported in spaced adjacent relation to the substrate and extending along the substrate, each of said electrical conductors when viewed from a point normal to the panel having an optical density which varies from a maximum near the center to a minimum at points on each side remote from the center
Claim 2
Dependent Claim
66 words
A transparent panel consisting of a dielectric transparent substrate, and a matrix of electrical conductors supported in spaced adjacent relation to the substrate and extending along the substrate, each of said electrical conductors when viewed from a point normal to the panel having an optical density which varies from a maximum near the center to a minimum at points on each side remote from the center
Claim 3
Dependent Claim
14 words
A panel of claim 1, in which the conductors are embedded in the substrate.
Claim 4
Dependent Claim
36 words
A panel of claim 1, in which each of said conductors has defined edges, and a moDifier superimposed on the conductors and extending laterally beyond the conductors, the modifier having edges as defined in claim 1.
Claim 5
Dependent Claim
44 words
A panel of claim 1, in which each of the conductors has boundaries which may appear discrete at low magnification but on higher magnification are shown to be nondiscrete and consist of a statistically diminishing number of particles from the conductor toward the boundary.
Claim 6
Dependent Claim
21 words
A panel of claim 1, in which the conductors laterally terminate in groups of particles in an area which transmits light.
Claim 7
Dependent Claim
15 words
A panel of claim 5, in which the particles of the boundary are randomly positioned.
Claim 8
Dependent Claim
15 words
A panel of claim 5, in which the particles of the boundary area are oriented.
Claim 9
Dependent Claim
21 words
A panel of claim 1, in which the conductors and boundary areas of low optical density consist of photographically deposited silver.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |