Patent US4393322A successfully refreshed from Google Patents.
US4393322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image intensifier faceplate
Assignee: Warner Lambert Technologies Inc
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Filing: 1980-08-15
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Granted: 1983-07-12
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Expires: 2000-08-15
Abstract
Abstract A glass faceplate having a central area of required useful diameter surrounded by a narrow ring of opaque glass and an outer glass mounting flange. Light entering the flange or ring is prevented from reaching the central area as stray light or glare in the system and spurious reflections at the interface of the ring and central area are minimized by a refractive index match of the two innermost glasses.
Inventors
- 👤 Walter P. Siegmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:35
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; C; C03; C03B; C03B23/00; C03B23/04; C03B23/047; H01J2229/00; H01J2229/89; H01J2229/8913
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
40 words
A faceplate for an image intensifier comprising the fused assembly of: a central glass plate having a finished edge; a ring of light-absorbing glass extending about said edge of said central plate; and an outer annular supporting flange of glass.
Claim 2
Dependent Claim
40 words
A faceplate for an image intensifier comprising the fused assembly of: a central glass plate having a finished edge; a ring of light-absorbing glass extending about said edge of said central plate; and an outer annular supporting flange of glass.
Claim 3
Dependent Claim
18 words
A faceplate according to claim 1 including a photocathode coating over one side of said central glass plate.
Claim 4
Dependent Claim
30 words
A faceplate according to claim 1 wherein said central glass plate has a diameter of approximately 18 mm and said ring has a thickness no greater than approximately 1 mm.
Claim 5
Dependent Claim
25 words
A faceplate according to claim 1 wherein the refractive index of the glass of said ring is approximately equal to that of said central plate.
References Cited (Backward Citations)
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US3037241A
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US3278283A
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US3455667A
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US3901718A
Cited
US3979621A
Cited
US4117366A
Cited
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US4310778A
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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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |