US2748306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge tube with luminescent substance coating
Assignee: Auralight AB
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Filing: 1951-06-05
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Granted: 1956-05-29
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Expires: 1971-06-05
Abstract
No abstract record available.
Inventors
- 👤 Bjorkman Karl Ake Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:02
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A GASEOUS ELECTRIC DISCHARGE LAMP COMPRISING A LIGHT TRANSMITTING ENVELOPE COATED WITH A LUMINESCENT MATERIAL AND HAVING AN ELECTRODE DISPOSED AT EACH END OF THE ENVELOPE, EACH OF SAID ELECTRODES BEING PROVIDED WITH A FOOT WITHIN AND CONNECTED WITH THE ENVELOPE AND WITH AT LEAST ONE LEAD-IN-WIRE, SAID FOOT EXTENDING ALONG AND AROUND THE LEAD-IN-WIRE WITHIN THE ENVELOPE BUT NOT AROUND THE ELECTRODE AND BEING COATED WITH UV-REFLECTING COATING CONSISTING OF A METAL OXIDE.
Claim 2
Dependent Claim
74 words
A GASEOUS ELECTRIC DISCHARGE LAMP COMPRISING A LIGHT TRANSMITTING ENVELOPE COATED WITH A LUMINESCENT MATERIAL AND HAVING AN ELECTRODE DISPOSED AT EACH END OF THE ENVELOPE, EACH OF SAID ELECTRODES BEING PROVIDED WITH A FOOT WITHIN AND CONNECTED WITH THE ENVELOPE AND WITH AT LEAST ONE LEAD-IN-WIRE, SAID FOOT EXTENDING ALONG AND AROUND THE LEAD-IN-WIRE WITHIN THE ENVELOPE BUT NOT AROUND THE ELECTRODE AND BEING COATED WITH UV-REFLECTING COATING CONSISTING OF A METAL OXIDE.
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |