US2719932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft glass ultraviolet discharge lamp
Assignee: General Electric Co
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Filing: 1949-03-14
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Granted: 1955-10-04
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Expires: 1969-03-14
Abstract
No abstract record available.
Inventors
- 👤 Stanworth John Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:29
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN ULTRAVIOLET ELECTRIC DISCHARGE LAMP COMPRISING A SEALED ENVELOPE CONTAINING MERCURY VAPOR AT A PRESSURE OF THE ORDER OF 10 MICRONS WHEREBY TO GENERATE A PREDOMINANCE OF ULTRAVIOLET RADIATIONS OF 2537 A. WAVE LENGTH DURING OPERATION AND HAVING A LIGHT TRANSMITTING PORTION CONSISTING OF A SOFT GLASS HAVING A COEFFICIENT OF EXPANSION IN THE NEIGHBORHOOD OF 8 TO 10X10-6 AND A BATCH COMPOSITION INCLUDING MATERIAL OF THE GROUP CONSISTING OF ALUMINUM POWDER AND SILICON POWDER AND MIXTURES THEREOF WHEREBY SAID GLASS IN A THICKNESS OF 1 MM. HAS A TRNASMISSION FOR RADIATIONS OF 2537 A. WAVE LENGTH IN EXCESS OF ABOUT 40%.
Claim 2
Dependent Claim
102 words
AN ULTRAVIOLET ELECTRIC DISCHARGE LAMP COMPRISING A SEALED ENVELOPE CONTAINING MERCURY VAPOR AT A PRESSURE OF THE ORDER OF 10 MICRONS WHEREBY TO GENERATE A PREDOMINANCE OF ULTRAVIOLET RADIATIONS OF 2537 A. WAVE LENGTH DURING OPERATION AND HAVING A LIGHT TRANSMITTING PORTION CONSISTING OF A SOFT GLASS HAVING A COEFFICIENT OF EXPANSION IN THE NEIGHBORHOOD OF 8 TO 10X10-6 AND A BATCH COMPOSITION INCLUDING MATERIAL OF THE GROUP CONSISTING OF ALUMINUM POWDER AND SILICON POWDER AND MIXTURES THEREOF WHEREBY SAID GLASS IN A THICKNESS OF 1 MM. HAS A TRNASMISSION FOR RADIATIONS OF 2537 A. WAVE LENGTH IN EXCESS OF ABOUT 40%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |