US3249788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode coating material and discharge device
Assignee: Philips North America LLC
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Filing: 1961-11-08
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Granted: 1966-05-03
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Expires: 1981-11-08
Abstract
No abstract record available.
Inventors
- 👤 Albert W Wainio
- 👤 Meister George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/067; H01J61/0675; H01J61/0677
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A FLUORESCENT LOW-PRESSURE DISCHARGE LAMP COMPRISING, A SEALED LIGHT-TRANSMITTING ELONGATED ENVELOPE, A PHOSPHOR COATING ON THE INNER SURFACE OF SAID ENVELOPE, A CHARGE OF VAPORIZABLE METAL AND AN INERT IONIZABLE GAS SEALED WITHIN SAID ENVELOPE, FILAMENTARY ELECTRODE COILS OPERATIVELY DISPOSED PROXIMATE THE ENDS OF THE SAID ENVELOPE, AND A PREDETERMINED AMOUNT OF ELECTRON-EMISSIVE COATING MATERIAL CARRIED ON SAID ELECTRODE COILS, SAID COATING MA-
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |