Patent US3405303A successfully refreshed from Google Patents.
US3405303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc discharge tube having an electrode which contains a light-emitting metal
Assignee: GTE Sylvania Inc
•
Filing: 1964-12-29
•
Granted: 1968-10-08
•
Expires: 1984-12-29
Abstract
No abstract record available.
Inventors
- 👤 Koury Frederic
- 👤 Wilfrid G Matheson
- 👤 John F Waymouth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:39
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/18; H01J61/04; H01J61/06; H01J61/073; H01J61/0735; H01J61/0737
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
AN ARC TUBE FOR A HIGH PRESSURE ELECTRIC DISCHARGE DEVICE COMPRISING: A GLASS ENVELOPE SEALED AT EITHER END; AN ELECTRODE SEALED AT EACH END THEREOF; AT LEAST ONE OF SAID ELECTRODES COMPRISING A TUBE OF TUNGSTEN AND A CORE OF AT LEAST ONE LIGHT-EMITTING METAL SELECTED FROM THE GROUP CONSISTING OF THORIUM, SCANDIUM, VANADIUM, YTTRIUM, PRASEODYMIMUM, GADOLINIUM, TERBIUM, DYSPROSIUM, ERBIUM, INDIUM, MOLYBEDNUM, GALLIUM, CADMIUM AND SODIUM; SAID ENVELOPE CONTAINING A FILL INCLUDING HALOGEN ATOMS AND MERCURY.
Claim 2
Dependent Claim
76 words
AN ARC TUBE FOR A HIGH PRESSURE ELECTRIC DISCHARGE DEVICE COMPRISING: A GLASS ENVELOPE SEALED AT EITHER END; AN ELECTRODE SEALED AT EACH END THEREOF; AT LEAST ONE OF SAID ELECTRODES COMPRISING A TUBE OF TUNGSTEN AND A CORE OF AT LEAST ONE LIGHT-EMITTING METAL SELECTED FROM THE GROUP CONSISTING OF THORIUM, SCANDIUM, VANADIUM, YTTRIUM, PRASEODYMIMUM, GADOLINIUM, TERBIUM, DYSPROSIUM, ERBIUM, INDIUM, MOLYBEDNUM, GALLIUM, CADMIUM AND SODIUM; SAID ENVELOPE CONTAINING A FILL INCLUDING HALOGEN ATOMS AND MERCURY.
References Cited (Backward Citations)
US2042195A
Cited
US2030807A
Cited
US2499192A
Cited
US2629836A
Cited
US2975320A
Cited
US3250940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |