US2707247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor electric discharge lamp
Assignee: Hanovia Chemical and Manufacturing Co
•
Filing: 1951-06-05
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Granted: 1955-04-26
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Expires: 1971-06-05
Abstract
No abstract record available.
Inventors
- 👤 Jr William T Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:16
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/18; H01J61/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A VAPOR ELECTRIC DISCHARGE LAMP COMPRISING AN ENVELOPE OF LIGHT TRANSMISSIVE HIGH TEMPERATURE GLASS HAVING A SUBSTANTIALLY SPHERICAL SHAPE, A PAIR OF ELECTRODES SPACED APART APPROXIMATELY ONE-FIFTH THE INNER DIAMETER OF THE ENVELOPE AND LESS THAN ONE CENTIMETER, SAID ENVELOPE CONTAINING SAID ELECTRODES AND A FILLING OF XENON GAS AT A PRESSURE IN EXCESS OF 2000 MILLIMETERS AND LESS THAN 11,000 MILLIMETERS AT 25* C. AND MERCURY BETWEEN 4.3X1019 AND 30X1019 MOLECULES PER MILLILITER OF ENVELOPE VOLUME.
Claim 2
Dependent Claim
77 words
A VAPOR ELECTRIC DISCHARGE LAMP COMPRISING AN ENVELOPE OF LIGHT TRANSMISSIVE HIGH TEMPERATURE GLASS HAVING A SUBSTANTIALLY SPHERICAL SHAPE, A PAIR OF ELECTRODES SPACED APART APPROXIMATELY ONE-FIFTH THE INNER DIAMETER OF THE ENVELOPE AND LESS THAN ONE CENTIMETER, SAID ENVELOPE CONTAINING SAID ELECTRODES AND A FILLING OF XENON GAS AT A PRESSURE IN EXCESS OF 2000 MILLIMETERS AND LESS THAN 11,000 MILLIMETERS AT 25* C. AND MERCURY BETWEEN 4.3X1019 AND 30X1019 MOLECULES PER MILLILITER OF ENVELOPE VOLUME.
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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) | 1958-04-25 | 1958-10-25 | 1959-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-25 | 1962-10-25 | 1963-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-25 | 1966-10-25 | 1967-04-26 | $7700.00 | Window Closed / Lapsed |