US2648013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent screen
Assignee: EIDP Inc
•
Filing: 1952-01-21
•
Granted: 1953-08-04
•
Expires: 1972-01-21
Abstract
No abstract record available.
Inventors
- 👤 Smith James Sterrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:02
CPC Classifications
G; G21; G21K; G21K4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A FLUORESCENT SCREEN COMPRISING A SUPPORT, A LAYER OF FLUORESCENT PARTICLES ON SAID SUPPORT AND AN OUTER PROTECTIVE LAYER COMPOSED OF A HYDROPHOBIC, HARD-FILM-FORMING POLYMER, THE OUTER SURFACE OF WHICH HAS A SHALLOW GROOVED PATTERN SURFACE, SAID GROOVES BEING REGULARLY SPACED, CONTINUOUS AND BEING FROM 0.02 TO 0.035 MM. IN DEPTH
Claim 2
Dependent Claim
51 words
A FLUORESCENT SCREEN COMPRISING A SUPPORT, A LAYER OF FLUORESCENT PARTICLES ON SAID SUPPORT AND AN OUTER PROTECTIVE LAYER COMPOSED OF A HYDROPHOBIC, HARD-FILM-FORMING POLYMER, THE OUTER SURFACE OF WHICH HAS A SHALLOW GROOVED PATTERN SURFACE, SAID GROOVES BEING REGULARLY SPACED, CONTINUOUS AND BEING FROM 0.02 TO 0.035 MM. IN DEPTH
References Cited (Backward Citations)
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Cited
US1532782A
Cited
US1532795A
Cited
US2304632A
Cited
US2436182A
Cited
US2340227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |