US2742376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying luminescent coatings
Assignee: RCA Corp
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Filing: 1953-08-24
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Granted: 1956-04-17
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Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 Larach Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:55
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; Y; Y10; Y10S; Y10S148/00; Y10S148/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF COATING A SURFACE WITH POWDERED LUMINESCENT MATERIAL WHICH COMPRISES: (1) APPLYING TO THE SURFACE TO BE COATED A SUSPENSION COMPRISING A POWDERED LUMINESCENT MATERIAL HAVING A HOST CRYSTAL CONSISTING ESSENTIALLY OF AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF SULPHUR AND SELENIUM AND AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF ZINC AND CADMIUM, A VOLATILE SOLVENT AND A RESIN THAT WILL DEPOLYMERIZE INTO VOLATILE UNITS WHEN HEATED TO BETWEEN ABOUT 100* AND 500* C. AND (2) HEATING THE COATED SURFACE IN A GASEOUS MEDIUM THAT IS INERT TO SAID LUMINESCENT MATERIAL TO A TEMPERATURE SUFFICIENT TO DEPOLYMERIZE THE RESIN.
Claim 2
Independent Claim
107 words
A METHOD OF COATING A SURFACE WITH POWDERED LUMINESCENT MATERIAL WHICH COMPRISES: (1) APPLYING TO THE SURFACE TO BE COATED A SUSPENSION COMPRISING A POWDERED LUMINESCENT MATERIAL HAVING A HOST CRYSTAL CONSISTING ESSENTIALLY OF AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF SULPHUR AND SELENIUM AND AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF ZINC AND CADMIUM, A VOLATILE SOLVENT AND A RESIN THAT WILL DEPOLYMERIZE INTO VOLATILE UNITS WHEN HEATED TO BETWEEN ABOUT 100* AND 500* C. AND (2) HEATING THE COATED SURFACE IN A GASEOUS MEDIUM THAT IS INERT TO SAID LUMINESCENT MATERIAL TO A TEMPERATURE SUFFICIENT TO DEPOLYMERIZE THE RESIN.
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |