Patent US4150320A successfully refreshed from Google Patents.
US4150320A
Expired / Lapsed
US
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Integral lens cathode ray tube system
Assignee: GTE Sylvania Inc
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Filing: 1977-07-18
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Granted: 1979-04-17
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Expires: 1997-07-18
Abstract
Abstract An integral lens cathode ray tube system includes a cathode ray tube having an electron gun for providing a visual display on a substantially spherical-shaped viewing portion and a glass panel affixed to the viewing portion by a resin disposed therebetween and optically matched to the glass panel and viewing portion of the cathode ray tube.
Inventors
- 👤 Robert B. Mitchell
- 👤 John P. O'Donnell
- 👤 Harry R. Swank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:19
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J2229/00; H01J2229/89; H01J2229/8901; H01J2229/8907; H01J2229/893
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
An integral cathode ray tube lens system suitable for use in a projection television system comprising: a cathode ray tube having an electron gun for providing a visual display on a substantially rectangular, spherical, and concave-shaped viewing portion; and an optically matched resin adapted to the contour of and affixed to said viewing portion, said resin formed to have a substantially rectangular, spherical, and convex-shaped viewing portion and providing a double concave compensating lens system whereby a visual image is focused on a substantially planar surface.
Claim 2
Dependent Claim
86 words
An integral cathode ray tube lens system suitable for use in a projection television system comprising: a cathode ray tube having an electron gun for providing a visual display on a substantially rectangular, spherical, and concave-shaped viewing portion; and an optically matched resin adapted to the contour of and affixed to said viewing portion, said resin formed to have a substantially rectangular, spherical, and convex-shaped viewing portion and providing a double concave compensating lens system whereby a visual image is focused on a substantially planar surface.
Claim 3
Dependent Claim
52 words
The integral cathode ray tube lens system of claim 1 wherein is included a substantially rectangular, spherical, concave-shaped glass panel disposed in back-to-back relationship with said viewing portion of said cathode ray tube and affixed thereto by said resin, said viewing portion and glass panel forming a double concave compensating lens system.
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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |