Patent US2714686A successfully refreshed from Google Patents.
US2714686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure mercury vapor electric discharge lamps
Assignee: General Electric Co
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Filing: 1950-08-02
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Granted: 1955-08-02
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Expires: 1970-08-02
Abstract
No abstract record available.
Inventors
- 👤 Isaacs George Glynn
- 👤 Nelson Evan Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:19
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/82; H01J61/822
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
IN A HIGH PRESSURE MERCURY VAPOR ELECTRIC DISCHARGE LAMP OF THE SHORT-GAP TYPE FOR OPERATION AT A POWER INPUT OF 500 WATTS, THE COMBINATION COMPRISING AN ENCLOSING ENVELOPE OF LIGHT-TRANSMISSIVE MATERIAL, A PAIR OF ELECTRODES DEFINING THEREBETWEEN AN ARC GAP HAVING A LENGTH
Claim 2
Dependent Claim
43 words
IN A HIGH PRESSURE MERCURY VAPOR ELECTRIC DISCHARGE LAMP OF THE SHORT-GAP TYPE FOR OPERATION AT A POWER INPUT OF 500 WATTS, THE COMBINATION COMPRISING AN ENCLOSING ENVELOPE OF LIGHT-TRANSMISSIVE MATERIAL, A PAIR OF ELECTRODES DEFINING THEREBETWEEN AN ARC GAP HAVING A LENGTH
References Cited (Backward Citations)
GB485489A
Cited
US2215300A
Cited
US2275739A
Cited
GB573141A
Cited
US2460739A
Cited
GB626951A
Cited
US2459579A
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 |