US4797594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reprographic aperture lamps having improved maintenance
Assignee: Osram Sylvania Inc
•
Filing: 1986-11-12
•
Granted: 1989-01-10
•
Expires: 2006-11-12
Abstract
Abstract An improved aperture fluorescent reprographic lamp is disclosed. The lamp of the present invention includes an elongated envelope containing an ionizable medium including mercury and having electrodes at each end of the envelope: a reflector layer on a major portion of the inner surface of the envelope, a phosphor layer disposed on and coextensive with the reflector layer, and a protective coating over at least the portion of the inner surface of the lamp envelope not covered with the reflector layer. The phosphor layer comprises particles of green-emitting zinc orthosilicate phosphor which are individually coated with a non-particulate, conformal aluminum oxide coating.
Inventors
- 👤 A. Gary Sigai
- 👤 Fred R. Taubner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:09
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/44
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
94 words
An aperture fluorescent reprographic lamp comprising: an elongated envelope containing an ionizable medium including mercury and having electrodes at each end of said envelope; a reflector layer on a major portion of the inner surface of said envelope; a phosphor layer disposed upon said reflector layer within said envelope, said phosphor layer comprising particles of green-emitting zinc orthosilicate phosphor, said particles being individually coated with a non-particulate, conformal coating of aluminum oxide; and a protective coating over at least the portion of the inner surface of said envelope not covered with said reflector layer.
Claim 2
Dependent Claim
94 words
An aperture fluorescent reprographic lamp comprising: an elongated envelope containing an ionizable medium including mercury and having electrodes at each end of said envelope; a reflector layer on a major portion of the inner surface of said envelope; a phosphor layer disposed upon said reflector layer within said envelope, said phosphor layer comprising particles of green-emitting zinc orthosilicate phosphor, said particles being individually coated with a non-particulate, conformal coating of aluminum oxide; and a protective coating over at least the portion of the inner surface of said envelope not covered with said reflector layer.
Claim 3
Dependent Claim
34 words
An aperture fluorescent reprographic lamp in accordance with claim 1 wherein the phosphor particles are individually coated with a non-particulate, conformal aluminum oxide coating of a thickness from about 90 to about 300 Angstroms.
Claim 4
Dependent Claim
17 words
An aperture fluorescent reprographic lamp in accordance with claim 1 wherein said reflector layer comprises titanium dioxide.
Claim 5
Dependent Claim
17 words
An aperture fluorescent reprographic lamp in accordance with claim 1 wherein said reflector layer comprises aluminum oxide.
Claim 6
Dependent Claim
27 words
An aperture fluorescent reprographic lamp in accordance with claim 4 wherein said protective coating comprises aluminum oxide particles having an average particle size of about 0.85 micrometers.
Claim 7
Dependent Claim
49 words
An aperture fluorescent reprographic lamp in accordance with claim 1 wherein said protective coating covers the portion of the inner surface of said envelope not covered with said reflector layer and further covers said reflector layer, said protective coating beinq interposed between said reflector layer and said phosphor layer.
Claim 8
Dependent Claim
119 words
An aperture fluorescent reprographic lamp comprising: an elongated vitreous glass envelope containing an ionizable medium including mercury and having electrodes at each end of said envelope; a reflector layer on a major portion of the inner surface of the envelope; a protective coating comprising submicron particle aluminum oxide disposed on the reflector layer and upon the portion of the inner surface of said envelope not covered with said reflector layer; and a phosphor layer disposed on the reflector layer having said protective coating thereon, said phosphor layer comprising particles of green-emitting zinc orthosilicate phosphor, said particles being individually coated with a non-particulate, conformal coating of aluminum oxide, said coating having a thickness of about 90 to about 300 Angstroms.
Claim 9
Dependent Claim
119 words
An aperture fluorescent reprographic lamp comprising: an elongated vitreous glass envelope containing an ionizable medium including mercury and having electrodes at each end of said envelope; a reflector layer on a major portion of the inner surface of the envelope; a protective coating comprising submicron particle aluminum oxide disposed on the reflector layer and upon the portion of the inner surface of said envelope not covered with said reflector layer; and a phosphor layer disposed on the reflector layer having said protective coating thereon, said phosphor layer comprising particles of green-emitting zinc orthosilicate phosphor, said particles being individually coated with a non-particulate, conformal coating of aluminum oxide, said coating having a thickness of about 90 to about 300 Angstroms.
Claim 10
Dependent Claim
17 words
An aperture fluorescent reprographic lamp in accordance with claim 7 wherein the reflector layer comprises titanium dioxide.
Claim 11
Dependent Claim
96 words
An aperture fluorescent reprographic lamp comprising: an elongated envelope containing an ionizable medium including mercury and having electrodes at each end of said envelope; an aluminum oxide reflector layer on a major portion of the inner surface of said envelope; a phosphor layer disposed upon said reflctor layer within said envelope, said phosphor layer comprising particles of green-emitting zinc orthosilicate phosphor, said particles being individually coated with a non-particulate, conformal coating of aluminum oxide; and a protective coating over at least the portion of the inner surface of said envelope not covered with said reflector layer.
Claim 12
Dependent Claim
96 words
An aperture fluorescent reprographic lamp comprising: an elongated envelope containing an ionizable medium including mercury and having electrodes at each end of said envelope; an aluminum oxide reflector layer on a major portion of the inner surface of said envelope; a phosphor layer disposed upon said reflctor layer within said envelope, said phosphor layer comprising particles of green-emitting zinc orthosilicate phosphor, said particles being individually coated with a non-particulate, conformal coating of aluminum oxide; and a protective coating over at least the portion of the inner surface of said envelope not covered with said reflector layer.
Claim 13
Dependent Claim
28 words
An aperture fluorescent reprographic lamp in accordance with claim 9 wherein said aluminum oxide reflector layer has a coating weight of about 8.8 to about 11.1 milligrams/square centimeter.
Claim 14
Dependent Claim
34 words
An aperture fluorescent reprographic lamp in accordance with claim 9 wherein said aluminum oxide reflector layer comprises particles of aluminum oxide having a surface area of about 4 to about 6 meter 2 /gram.
Claim 15
Dependent Claim
24 words
An aperture fluorescent reprographic lamp in accordance with claim 11 wherein the aluminum oxide particles have a median particle size of about 0.85 micrometers.
Claim 16
Dependent Claim
121 words
An aperture fluorescent reprographic lamp comprising: an elongated vitreous glass envelope containing an ionizable medium including mercury and having electrodes at each end of said envelope; an aluminum oxide reflector layer on a major portion of the inner surface of the envelope; a protective coating comprising submicron particle aluminum oxide disposed on the reflector layer and upon the portion of the inner surface of said envelope not covered with said reflector layer; and a phosphor layer disposed on the reflector layer having said protective coating thereon, said phosphor layer comprising particles of green-emitting zinc orthosilicate phosphor, said particles being individually coated with a non-particulate, conformal coating of aluminum oxide, said coating having a thickness of about 90 to about 300 Angstroms.
Claim 17
Dependent Claim
121 words
An aperture fluorescent reprographic lamp comprising: an elongated vitreous glass envelope containing an ionizable medium including mercury and having electrodes at each end of said envelope; an aluminum oxide reflector layer on a major portion of the inner surface of the envelope; a protective coating comprising submicron particle aluminum oxide disposed on the reflector layer and upon the portion of the inner surface of said envelope not covered with said reflector layer; and a phosphor layer disposed on the reflector layer having said protective coating thereon, said phosphor layer comprising particles of green-emitting zinc orthosilicate phosphor, said particles being individually coated with a non-particulate, conformal coating of aluminum oxide, said coating having a thickness of about 90 to about 300 Angstroms.
Claim 18
Dependent Claim
28 words
An aperture fluorescent reprographic lamp in accordance withi claim 13 wherein said aluminum oxide reflector layer has a coating weight of about 8.8 to about 11.1 milligrams/square centimeter.
Claim 19
Dependent Claim
34 words
An aperture fluorescent reprographic lamp in accordance with claim 13 wherein said aluminum oxide reflector layer comprises particles of aluminum oxide having a surface area of about 4 to about 6 meter 2 /gram.
Claim 20
Dependent Claim
24 words
An aperture fluorescent reprographic lamp in accordance with claim 15 wherein the aluminum oxide particles have a median particle size of about 0.85 micrometers.
References Cited (Backward Citations)
US2151496A
Cited
US2238784A
Cited
US2331306A
Cited
US2386277A
Cited
US2586304A
Cited
US2892956A
Cited
US2817599A
Cited
US2878137A
Cited
US2920003A
Cited
US2971859A
Cited
US3115309A
Cited
US3047512A
Cited
US3141990A
Cited
US3067356A
Cited
US3251337A
Cited
US3408223A
Cited
US3549412A
Cited
US3636352A
Cited
US3717781A
Cited
US3875449A
Cited
US3599029A
Cited
US3923682A
Cited
GB1343250A
Cited
US3886396A
Cited
US3845343A
Cited
US3963639A
Cited
US3984587A
Cited
JPS5098057A
Cited
JPS5098065A
Cited
JPS5098063A
Cited
DE2450435A1
Cited
US4289991A
Cited
US4079288A
Cited
US3995192A
Cited
US3995191A
Cited
US4058639A
Cited
US4208448A
Cited
US4287229A
Cited
US4473634A
Cited
US4243909A
Cited
US4339501A
Cited
US4231892A
Cited
JPS5657247A
Cited
US4440800A
Cited
US4396863A
Cited
DE3032225A1
Cited
US4515827A
Cited
US4639637A
Cited
US4670688A
Cited
US4459507A
Cited
US4551397A
Cited
US4505720A
Cited
US4691140A
Cited
DE3408237A1
Cited
US4585673A
Cited
EP0160856A2
Cited
US4710674A
Cited
JPS6191847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |