US3555336A
Expired / Lapsed
US
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Cadmium vapor discharge lamp containing a europium activated phosphor
Assignee: US Philips Corp
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Filing: 1968-09-03
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Granted: 1971-01-12
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Expires: 1988-09-03
Abstract
Abstract A cadmium vapor discharge lamp containing a bivalent europium activated luminescent substance.
Inventors
- 👤 Mijndert Koedamr
- 👤 Willem Lambertus Wanmaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:27
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7728; C09K11/7737; C09K11/7738
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
18 words
The lamp of claim 1 wherein the phosphor is located on the inner side of the glass envelope.
Claim 2
Dependent Claim
15 words
The lamp of claim 1 wherein the glass envelope is surrounded by an outer bulb.
Claim 3
Dependent Claim
17 words
The lamp of claim 3 wherein the phosphor is located on the innerside of the outer bulb.
Claim 4
Dependent Claim
18 words
The lamp of claim 3 wherein the phosphor is located on the outer side of the glass envelope.
Claim 5
Dependent Claim
18 words
The lamp of claim 3 wherein the space between the glass enveloped and the outer bulb is exhausted.
Claim 6
Dependent Claim
31 words
The lamp of claim 3 wherein the inner side of the outer bulb is provided with a layer which strongly reflects infrared rays but is previous to visible or ultraviolet radiation.
Claim 7
Dependent Claim
11 words
The lamp of claim 1 wherein the phosphor satisfies the formula
Claim 8
Dependent Claim
11 words
The lamp of claim 1 wherein the phosphor satisfies the formula
Claim 9
Dependent Claim
11 words
The lamp of claim 1 wherein the phosphor satisfies the formula
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |