Patent US4158419A successfully refreshed from Google Patents.
US4158419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implosion protected CRT
Assignee: RCA Licensing Corp
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Filing: 1977-12-27
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Granted: 1979-06-19
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Expires: 1997-12-27
Abstract
Abstract In combination, a CRT (cathode-ray tube) comprising an envelope including a glass faceplate panel and an adjoining glass funnel sealed to said panel, an elastomeric film coating consisting essentially of polyurethane around and adhered to said panel and a continuous metal reinforcing structure around said panel and adhered to said film coating.
Inventors
- 👤 Richard A. Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:03
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/87; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
In combination, a cathode-ray tube comprising an envelope including a glass faceplate panel and an adjoining glass funnel sealed to said panel, an elastomeric film coating consisting essentially of polyurethane around and adhered to said panel, and a continuous metal reinforcing structure around said panel and adhered to said film coating in overlapping relationship therewith, said funnel including integral means therein for facilitating the fracturing thereof when window fragments from an implosion of said tube strike said funnel.
Claim 2
Dependent Claim
78 words
In combination, a cathode-ray tube comprising an envelope including a glass faceplate panel and an adjoining glass funnel sealed to said panel, an elastomeric film coating consisting essentially of polyurethane around and adhered to said panel, and a continuous metal reinforcing structure around said panel and adhered to said film coating in overlapping relationship therewith, said funnel including integral means therein for facilitating the fracturing thereof when window fragments from an implosion of said tube strike said funnel.
Claim 3
Dependent Claim
20 words
The combination defined in claim 1 wherein extended surfaces of said glass funnel are abraded to facilitate the fracture thereof.
Claim 4
Dependent Claim
25 words
The combination defined in claim 1 wherein surfaces of said funnel include a pattern of valleys and ridges molded therein to facilitate the fracture thereof.
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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) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |