US2607014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric gaseous discharge device
Assignee: GTE Sylvania Inc
•
Filing: 1947-11-08
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Granted: 1952-08-12
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Expires: 1967-11-08
Abstract
No abstract record available.
Inventors
- 👤 Roy Joseph Arthur
- 👤 Robert S Ives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:26
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/74; C09K11/75; C09K11/758; C09K11/02; C09K11/025; C09K11/757; H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A FLUORESCENT LAMP COMPRISING A GLASS ENVELOPE ELECTRODES SEALED IN SAID ENVELOPE, A FILLING OF AT LEAST ONE INERT GAS AT LOW PRESSURE IN SAID ENVELOPE, A QUANTITY OF MERCURY IN SAID ENVELOPE, AND A COATING ON THE INSIDE WALL OF SAID ENVELOPE, SAID COATING COMPRISING AN ACTIVATED FLUORESCENT
Claim 2
Dependent Claim
49 words
A FLUORESCENT LAMP COMPRISING A GLASS ENVELOPE ELECTRODES SEALED IN SAID ENVELOPE, A FILLING OF AT LEAST ONE INERT GAS AT LOW PRESSURE IN SAID ENVELOPE, A QUANTITY OF MERCURY IN SAID ENVELOPE, AND A COATING ON THE INSIDE WALL OF SAID ENVELOPE, SAID COATING COMPRISING AN ACTIVATED FLUORESCENT
References Cited (Backward Citations)
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Cited
US2241950A
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US2344081A
Cited
US2306626A
Cited
US2317977A
Cited
US2316366A
Cited
US2433404A
Cited
GB578195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |