US3814969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge tube with phosphor coating and elongate electrodes
Assignee: Panasonic Holdings Corp
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Filing: 1972-10-24
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Granted: 1974-06-04
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Expires: 1992-10-24
Abstract
Abstract A gas discharge tube is provided which comprises a glass tube, a coating of phosphor applied to the inner walls of the glass tube, a pair of electrodes disposed in parallel to each other along the substantial length of the glass tube, and some amounts of mercury and a neon-argon gas mixture or a neon-helium-argon gas mixture.
Inventors
- 👤 K Ueda
- 👤 M Sangen
- 👤 S Kamiya
- 👤 H Ohtsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:40
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/66; C09K11/664; C09K11/59; C09K11/74; C09K11/77; C09K11/7728; C09K11/7737; C09K11/7738; C09K11/7766; C09K11/7776; H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/067
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
A gas discharge tube as defined in claim 1 wherein said coating of phosphor consists of one of divalent europium activated phosphate alkaline earth metals, divalent manganese activated zinc silicate, trivalent europium activated yttrium vanadate, trivalent dysprosium activated yttrium vanadate, tetravalent manganese activated magnesium arsenate and tetravalent manganese activated magnesium germafluoride.
Claim 2
Dependent Claim
25 words
A gas discharge tube as defined in claim 1 wherein said sealed inert gases consist of 30 percent of neon and 70 percent of argon.
Claim 3
Dependent Claim
51 words
A gas discharge tube as defined in claim 3 wherein said coating of phosphor consists of one of divalent europium activated phosphate alkaline earth metals, divalent manganese activated zinc silicate, trivalent europium activated yttrium vanadate, trivalent dysprosium activated yttrium vanadate, tetravalent manganese activated magnesium arsenate and tetravalent manganese activated magnesium germafluoride.
Claim 4
Dependent Claim
29 words
A gas discharge lamp as defined in claim 1 wherein said sealed inert gases consist of 26 percent of neon, 8 percent of helium and 66 percent of argon.
Claim 5
Dependent Claim
51 words
A gas discharge tube as defined in claim 5 wherein said coating of phosphor consists of one of divalent europium activated phosphate alkaline earth metals, divalent manganese activated zinc silicate, trivalent europium activated yttrium vanadate, trivalent dysprosium activated yttrium vanadate, tetravalent manganese activated magnesium arsenate and tetravalent manganese activated magnesium germafluoride.
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |