US2684306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fluorescent screens by settling materials from liquid suspepnsions
Assignee: EMI Ltd
•
Filing: 1948-09-30
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Granted: 1954-07-20
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Expires: 1968-09-30
Abstract
No abstract record available.
Inventors
- 👤 Brewer Leslie Herculean
- 👤 Stanley Vincent Arthur
- 👤 Puleston Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:57
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
IN A METHOD OF PRODUCING A LUMINESCENT SCREEN, THE STEPS OF MIXING PHOSPHOR PARTICLES, A SILICATE SOLUTION AND A MAGNESIUM SULPHATE SOLUTION TO FORM A LIQUID MEDIUM CONTAINING FINE PARTICLES OF MAGNESIUM SILCATE MIXED WITH PHOSPHOR PARTICLES, AND SETTLING PARTICLES OF PHOSPHOR ON TO A SUPPORT FROM SAID LIQUID MEDIUM.
Claim 2
Dependent Claim
50 words
IN A METHOD OF PRODUCING A LUMINESCENT SCREEN, THE STEPS OF MIXING PHOSPHOR PARTICLES, A SILICATE SOLUTION AND A MAGNESIUM SULPHATE SOLUTION TO FORM A LIQUID MEDIUM CONTAINING FINE PARTICLES OF MAGNESIUM SILCATE MIXED WITH PHOSPHOR PARTICLES, AND SETTLING PARTICLES OF PHOSPHOR ON TO A SUPPORT FROM SAID LIQUID MEDIUM.
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) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |