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US2829295A
Expired / Lapsed
US
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Internally conductively coated lamp and method of manufacture
Assignee: US Philips Corp
•
Filing: 1950-07-12
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Granted: 1958-04-01
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Expires: 1970-07-12
Abstract
No abstract record available.
Inventors
- 👤 Gast Theodorus Adrianus Maria
- 👤 Frederik Hans Jan Van Hoorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:12
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J61/00; H01J61/02; H01J61/54; H01J61/545
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD OF PROVIDING A STARTING STRIP FOR AN ELECTRIC GASEOUS DISCHARGE TUBE INCLUDING A GLASS ENVELOPE, A PAIR OF SPACED ELECTRODES IN THE ENVELOPE, AND A LUMINESCENT LAYER ON THE INTERNAL SURFACE OF THE ENVELOPE WHICH COMPRISES FORMING A SUSPENSION OF FINELY-GROUND GRAPHITE IN AN ORGANIC SOLVENT CONTAINING AN ORGANIC HEAT-
Claim 2
Independent Claim
52 words
A METHOD OF PROVIDING A STARTING STRIP FOR AN ELECTRIC GASEOUS DISCHARGE TUBE INCLUDING A GLASS ENVELOPE, A PAIR OF SPACED ELECTRODES IN THE ENVELOPE, AND A LUMINESCENT LAYER ON THE INTERNAL SURFACE OF THE ENVELOPE WHICH COMPRISES FORMING A SUSPENSION OF FINELY-GROUND GRAPHITE IN AN ORGANIC SOLVENT CONTAINING AN ORGANIC HEAT-
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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |