US3023340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphor, lamp and method
Assignee: Westinghouse Electric Corp
•
Filing: 1959-10-29
•
Granted: 1962-02-27
•
Expires: 1979-10-29
Abstract
No abstract record available.
Inventors
- 👤 Robert W Repsher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:41
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/72; C09K11/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A FLUORESCENT LAMP COMPRISING A LIGHT-TRANSMITTING ENVELOPE HAVING ELECTRODES OPERATIVELY DISPOSED THEREIN AND CONTAINING AN INERT IONIZABLE GAS AND A CHARGE OF MERCURY, A COATING ON THE INNER SURFACE OF SAID ENVELOPE COMPRISING HALOPHOSPHATE PHOSPHOR, SAID HALOPHOSPHATE PHOSPHOR HAVING BEEN PROCESSED AFTER FORMATION BY FIRING AND BEFORE LAMP ENVELOPE COATING BY THE METHOD COMPRISING, FINELY DIVIDING FIRED HALOPHOSPHATE PHOSPHOR TO SUCH DEGREE THAT SUBSTANTIALLY ALL RESULTING PHOSPHOR PARTICLES HAVE A DIAMETER LESS THAN 20 MICRONS, MIXING TOGETHER THE FINELY-DIVIDED PHOSPHOR AND AN AQUEOUS ACIDIC SOLUTION, SEPARATING THE PHOSPHOR FROM THE AQUEOUS ACIDIC SOLUTION, REMOVING SUBSTANTIALLY ALL RESIDUAL ACID FROM THE
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) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |