Patent US2898225A successfully refreshed from Google Patents.
US2898225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image display device
Assignee: GTE Sylvania Inc
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Filing: 1957-12-31
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Granted: 1959-08-04
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Expires: 1977-12-31
Abstract
No abstract record available.
Inventors
- 👤 Thaddeus V Rychlewski
- 👤 Robert F Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:44
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS OF FORMING A LUMINESCENT SCREEN UPON A GLASS SUBSTRATE COMPRISING THE STEPS OF HEATING A PHOSPHOR SELECTED FROM THE GROUP CONSISTING OF CADMIUM AND ZINC CADMIUM SULFIDE AND SELENIDE TOGETHER WITH A SALT TO VAPOR DEPOSIT THE PHOSPHOR ON SAID SUBSTRATE, AND SUBSEQUENTLY FIRING THE PHOSPHOR TO PROMOTE THE LUMINESCENT PROPERTIES THEREOF.
Claim 2
Dependent Claim
54 words
A PROCESS OF FORMING A LUMINESCENT SCREEN UPON A GLASS SUBSTRATE COMPRISING THE STEPS OF HEATING A PHOSPHOR SELECTED FROM THE GROUP CONSISTING OF CADMIUM AND ZINC CADMIUM SULFIDE AND SELENIDE TOGETHER WITH A SALT TO VAPOR DEPOSIT THE PHOSPHOR ON SAID SUBSTRATE, AND SUBSEQUENTLY FIRING THE PHOSPHOR TO PROMOTE THE LUMINESCENT PROPERTIES THEREOF.
References Cited (Backward Citations)
US2732313A
Cited
US2732312A
Cited
US2600579A
Cited
US2672451A
Cited
US2789062A
Cited
US2685530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |