US3892997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc discharge lamp for producing controlled energy spectrum
Assignee: Duro Test Corp
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Filing: 1972-03-27
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Granted: 1975-07-01
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Expires: 1992-03-27
Abstract
Abstract A vapor discharge lamp which produces visible light energy and energy in the middle and near ranges of the ultraviolet region of a quantity from between about 6 to 50 and 150 to 700 microwatts respectively per lumen of visible light produced.
Inventors
- 👤 Luke Thorington
- 👤 Louis J Parascandola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:23
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; C; C09; C09K; C09K11/00; C09K11/08; C09K11/66; H01J61/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A high pressure arc discharge lamp for operation from a source of voltage comprising an envelope, a pair of electrodes for connection to said source of voltage and an ionizable material within said envelope, said electrodes and ionizable material producing an arc discharge which emits energy in both the visible light and ultraviolet range, and means interacting with the energy emitted by the arc discharge to modify the energy such that ultraviolet energy is transmitted through the envelope in the middle range and near range respectively of between about 6 to 50 and 150 to 700 microwatts per lumen of the visible light transmitted through the envelope and with a radiant power ratio of near ultraviolet/middle ultraviolet in a range of between about 8 to 40.
Claim 2
Dependent Claim
126 words
A high pressure arc discharge lamp for operation from a source of voltage comprising an envelope, a pair of electrodes for connection to said source of voltage and an ionizable material within said envelope, said electrodes and ionizable material producing an arc discharge which emits energy in both the visible light and ultraviolet range, and means interacting with the energy emitted by the arc discharge to modify the energy such that ultraviolet energy is transmitted through the envelope in the middle range and near range respectively of between about 6 to 50 and 150 to 700 microwatts per lumen of the visible light transmitted through the envelope and with a radiant power ratio of near ultraviolet/middle ultraviolet in a range of between about 8 to 40.
Claim 3
Dependent Claim
15 words
A lamp as set forth in claim 1 wherein the ionizable material is mercury vapor.
Claim 4
Dependent Claim
26 words
A lamp as set forth in claim 1 wherein the visible light transmitted through the envelope has a CIE color rendering index of at least 50.
Claim 5
Dependent Claim
34 words
A lamp as in claim 1 further comprising an outer envelope within which said fist-named envelope is located, said means interacting with the energy emitted by said arc discharge located at said outer envelope.
Claim 6
Dependent Claim
31 words
A lamp as set forth in claim 4 wherein said means for interacting with the energy produced by the arc discharge comprises a phosphor on a wall of the outer envelope.
Claim 7
Dependent Claim
30 words
A lamp as in claim 4 wherein said means interacting with the energy comprises said outer envelope which blocks a predetermined portion of the energy emitted by the arc discharge.
Claim 8
Dependent Claim
31 words
A lamp as in claim 6 wherein said means for interacting with the energy emitted by the arc stream discharge also includes a phosphor on a wall of the outer envelope.
Claim 9
Dependent Claim
43 words
A lamp as set forth in claim 1 further comprising an outer envelope within which said first-named envelope is located and wherein said means interacting with the energy produced by the arc discharge comprises a phosphor on a wall of the outer envelope.
Claim 10
Dependent Claim
16 words
A lamp as set forth in claim 5 wherein said phosphor comprises manganese activated magnesium fluorogermanate.
Claim 11
Dependent Claim
27 words
A lamp as set forth in claim 4 wherein the visible light transmitted through said outer envelope has a CIE color rendering index of at least 50.
References Cited (Backward Citations)
US2748303A
Cited
US3148300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |