US2987414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of luminescent materials
Assignee: General Electric Co
•
Filing: 1956-12-03
•
Granted: 1961-06-06
•
Expires: 1976-12-03
Abstract
No abstract record available.
Inventors
- 👤 William C Martyny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:53
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
THE METHOD OF COATING A GLASS LAMP ENVELOPE WITH FINELY DIVIDED INORGANIC LUMINESCENT MATERIALS WHICH COMPRISES PRELIMINARILY TREATING THE MATERIALS BY PREPARING A MIXTURE OF SAID LUMINESCENT MATERIALS, WATER, AMMONIUM HYDROXIDE AND A COPOLYMER OF METHYL VINYL ETHER AND MALEIC ANHYDRIDE SAID MIXTURE HAVING A PH VALUE OF AT LEAST ABOUT 8, MILLING SAID MIXTURE FOR A TIME SUFFICIENT TO REDUCE THE PHOSPHOR PARTICLES TO THE ULTIMATE SIZE DESIRED WHILE MAINTAINING SAID PH VALUE THROUGHOUT,
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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |