US2898226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: GTE Sylvania Inc
•
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
- 👤 Lyle W Evans
- 👤 Thaddeus V Rychlewski
- 👤 Robert F Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:30
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS OF FORMING A LUMINESCENT SCREEN UPON A SUBSTRATE COMPRISING THE STEPS OF VAPOR DEPOSITING A FILM OF PHOSPHOR UPON SAID SUBSTRATE, VAPOR DEPOSITING A COATING OF A PHOSPHOR ACTIVATOR OVER THE PHOSPHOR FILM, AND FIRING SAID SCREEN TO PROMOTE ACTIVATION OF THE PHOSPHOR.
Claim 2
Dependent Claim
45 words
A PROCESS OF FORMING A LUMINESCENT SCREEN UPON A SUBSTRATE COMPRISING THE STEPS OF VAPOR DEPOSITING A FILM OF PHOSPHOR UPON SAID SUBSTRATE, VAPOR DEPOSITING A COATING OF A PHOSPHOR ACTIVATOR OVER THE PHOSPHOR FILM, AND FIRING SAID SCREEN TO PROMOTE ACTIVATION OF THE PHOSPHOR.
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 |