US2714684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low pressure fluoresecent and discharge lamps
Assignee: Westinghouse Electric Corp
•
Filing: 1949-06-29
•
Granted: 1955-08-02
•
Expires: 1969-06-29
Abstract
No abstract record available.
Inventors
- 👤 Meister George
- 👤 Thomas H Heine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:54
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/18; H01J61/20; H01J61/70; H01J61/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A DISCHARGE LAMP COMPRISING AN ELONGATED TRANSLUCENT VITREOUS ENVELOPE, AN ELECTRODE IN EACH END PORTION OF SAID ENVELOPE, AND A CONTAINED MIXTURE OF KRYPTON AND ARGON ADMIXED WITH MERCURY VAPOR, THE PROPORTION OF THE KRYPTON BEING BETWEEN 45% AND 55%, AND THAT OF THE ARGON BEING BETWEEN 55% AND 45% OF THE GAS MIXTURE.
Claim 2
Dependent Claim
54 words
A DISCHARGE LAMP COMPRISING AN ELONGATED TRANSLUCENT VITREOUS ENVELOPE, AN ELECTRODE IN EACH END PORTION OF SAID ENVELOPE, AND A CONTAINED MIXTURE OF KRYPTON AND ARGON ADMIXED WITH MERCURY VAPOR, THE PROPORTION OF THE KRYPTON BEING BETWEEN 45% AND 55%, AND THAT OF THE ARGON BEING BETWEEN 55% AND 45% OF THE GAS MIXTURE.
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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) | 1958-08-01 | 1959-01-31 | 1959-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-01 | 1963-01-31 | 1963-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-01 | 1967-01-31 | 1967-08-02 | $7700.00 | Window Closed / Lapsed |