US2919361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light tubes and walls with radioactive cold cathodes
Assignee: ANNITA T SPOLTER
•
Filing: 1957-04-11
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Granted: 1959-12-29
•
Expires: 1977-04-11
Abstract
No abstract record available.
Inventors
- 👤 Tschakert Wilfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:35
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/067; H01J61/54; H01J61/548
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
AN ILLUMINATING STRUCTURE COMPRISING A GAS TIGHT HALLOW BODY, A FIRST ELECTRODE CONSTITUTING A CATHODE WITHIN SAID HALLOW BODY, A SECOND ELECTRODE CONSITITUTING AN ANODE WITHIN SAID BODY, SAID ELECTRODES BEING SPACED FROM EACH OTHER, MEANS FOR IMPRESSING AN ELECTRICAL POTENTIAL ACROSS SAID FIRST AND SECOND ELECTRODES, SAID FIRST ELECTRODE INCLUDING RODS OF RADIOACTIVE MATERIAL HAVING AN ELECTRON PRODUCING ALKALINE EARTH METAL COATING THEREON, SAID SECOND ELECTRODE BEING IN THE FORM OF A WIRE SCREEN PARTIALLY EMBEDDED IN SAID BODY, AN INTERIOR SURFACE IN SAID HALLOW BODY, SAID INTERIOR SURFACE BEING COATED WITH PHOSPHOR,
Claim 2
Dependent Claim
94 words
AN ILLUMINATING STRUCTURE COMPRISING A GAS TIGHT HALLOW BODY, A FIRST ELECTRODE CONSTITUTING A CATHODE WITHIN SAID HALLOW BODY, A SECOND ELECTRODE CONSITITUTING AN ANODE WITHIN SAID BODY, SAID ELECTRODES BEING SPACED FROM EACH OTHER, MEANS FOR IMPRESSING AN ELECTRICAL POTENTIAL ACROSS SAID FIRST AND SECOND ELECTRODES, SAID FIRST ELECTRODE INCLUDING RODS OF RADIOACTIVE MATERIAL HAVING AN ELECTRON PRODUCING ALKALINE EARTH METAL COATING THEREON, SAID SECOND ELECTRODE BEING IN THE FORM OF A WIRE SCREEN PARTIALLY EMBEDDED IN SAID BODY, AN INTERIOR SURFACE IN SAID HALLOW BODY, SAID INTERIOR SURFACE BEING COATED WITH PHOSPHOR,
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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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |