US3899241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual display windshield
Assignee: PPG Industries Inc
•
Filing: 1973-12-11
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Granted: 1975-08-12
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Expires: 1993-12-11
Abstract
Abstract A windshield adapted for use in aircraft is provided with a transparent reflective coating on the inboard surface in the center portion of the forward vision area to form a visual image receiving area.
Inventors
- 👤 Jr Rudolph L Malobicky
- 👤 James B Perkins
- 👤 Robert H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:57
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B2027/0118
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
131 words
An aircraft forward vision area windshield comprising: a flat lamination of a plurality of transparent plies having a central vision area provided with a high degree of optical regularity which is surrounded by marginal areas for which optical regularity is less critical; and a visual image receiving area on said lamination consisting of a transparent, reflective, cathodically sputtered, metal oxide coating having an index of refraction of at least about 2.0 on a substantial portion of the inboard surface of said central area, said visual image receiving area being at least 60% visible light transmissive normal to the plane of the windshield and having a reflectivity to visible light of less than about 25% from the inboarD side at an angle of 60* from normal to the plane of the windshield.
Claim 2
Dependent Claim
131 words
An aircraft forward vision area windshield comprising: a flat lamination of a plurality of transparent plies having a central vision area provided with a high degree of optical regularity which is surrounded by marginal areas for which optical regularity is less critical; and a visual image receiving area on said lamination consisting of a transparent, reflective, cathodically sputtered, metal oxide coating having an index of refraction of at least about 2.0 on a substantial portion of the inboard surface of said central area, said visual image receiving area being at least 60% visible light transmissive normal to the plane of the windshield and having a reflectivity to visible light of less than about 25% from the inboarD side at an angle of 60* from normal to the plane of the windshield.
Claim 3
Dependent Claim
13 words
The windshield of claim 1 wherein said coating consists essentially of indium oxide.
Claim 4
Dependent Claim
19 words
The windshield of claim 1 wherein said coating covers about one half of the inboard surface of said lamination.
Claim 5
Dependent Claim
18 words
The windshield of claim 1 wherein about one half of said central area is covered by said coating.
References Cited (Backward Citations)
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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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |