US2714682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low pressure fluorescent and discharge lamps
Assignee: Westinghouse Electric Corp
•
Filing: 1952-06-27
•
Granted: 1955-08-02
•
Expires: 1972-06-27
Abstract
No abstract record available.
Inventors
- 👤 Meister George
- 👤 Thomas H Heine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:51
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A FLUORESCENT LAMP COMPRISING AN ELONGATED PHOSPHOR-COATED TRANSLUCENT VITREOUS ENVELOPE, AN ELECTRODE IN EACH END PORTION OF SAID ENVELOPE, AND A CONTAINED MIXTURE OF ABOUT 20% XENON AND 80% ARGON ADMIXED WITH MERCURY VAPOR AND AT A PRESSURE BETWEEN 1 AND 4 MM. OF MERCURY SO THAT THE QUANTITY OF LIGHT PRODUCED, AND EFFICIENCY OF LIGHT GENERATION IS APPROXIMATELY AT A MIXIMUM.
Claim 2
Dependent Claim
62 words
A FLUORESCENT LAMP COMPRISING AN ELONGATED PHOSPHOR-COATED TRANSLUCENT VITREOUS ENVELOPE, AN ELECTRODE IN EACH END PORTION OF SAID ENVELOPE, AND A CONTAINED MIXTURE OF ABOUT 20% XENON AND 80% ARGON ADMIXED WITH MERCURY VAPOR AND AT A PRESSURE BETWEEN 1 AND 4 MM. OF MERCURY SO THAT THE QUANTITY OF LIGHT PRODUCED, AND EFFICIENCY OF LIGHT GENERATION IS APPROXIMATELY AT A MIXIMUM.
References Cited (Backward Citations)
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Cited
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 |