US2637830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of electric lamp envelopes
Assignee: GTE Sylvania Inc
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Filing: 1949-02-28
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Granted: 1953-05-05
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Expires: 1969-02-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Sharkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:07
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/24; H01J61/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN ELECTRIC GASEOUS DISCHARGE DEVICE COMPRISING: A SEALED, GLASS, LIGHT-TRANSMITTING ENVELOPE; A FILLING OF INERT GAS AT A PRESSURE OF A FEW MILLIMETERS IN SAID ENVELOPE; A FILLING OF MERCURY IN SAID ENVELOPE; SPACED ELECTRODES CONTAINED WITHIN SAID ENVELOPE; A COATING OF AN OXIDE OF AT LEAST ONE OF THE ALKALINE EARTH METALS ON SAID ELECTRODES; AND A SINGLE COATING ON THE INNER WALL OF SAID ENVELOPE, SAID COATING CONSISTING ESSENTIALLY OF BETWEEN ABOUT .003 MG. TO ABOUT .03 MG. PER SQUARE INCH OF AN OXIDE OF ANTIMONY.
Claim 2
Dependent Claim
88 words
AN ELECTRIC GASEOUS DISCHARGE DEVICE COMPRISING: A SEALED, GLASS, LIGHT-TRANSMITTING ENVELOPE; A FILLING OF INERT GAS AT A PRESSURE OF A FEW MILLIMETERS IN SAID ENVELOPE; A FILLING OF MERCURY IN SAID ENVELOPE; SPACED ELECTRODES CONTAINED WITHIN SAID ENVELOPE; A COATING OF AN OXIDE OF AT LEAST ONE OF THE ALKALINE EARTH METALS ON SAID ELECTRODES; AND A SINGLE COATING ON THE INNER WALL OF SAID ENVELOPE, SAID COATING CONSISTING ESSENTIALLY OF BETWEEN ABOUT .003 MG. TO ABOUT .03 MG. PER SQUARE INCH OF AN OXIDE OF ANTIMONY.
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |