US2660539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a fluorescent screen
Assignee: Westinghouse Electric Corp
•
Filing: 1950-02-25
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Granted: 1953-11-24
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Expires: 1970-02-25
Abstract
No abstract record available.
Inventors
- 👤 Charles W Putnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:58
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/28; C; C09; C09K; C09K11/00; C09K11/08; C09K11/56; C09K11/562; C09K11/565; H01J9/00; H01J9/02; H01J9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF FORMING A FLUORESCENT SCREEN WHICH COMPRISES COATING A SUPPORTING MEMBER CONSISTING OF A MIXTURE OF 0% TO 40% POTASSIUM OXIDE, 0% TO 60% ZINE OXIDE AND 100% TO 40% BORIC OXIDE WITH A THIN DRY LAYER OF ZINC SULPHIDE, HEATING SAID MEMBER UNTIL SAID ZINC SULPHIDE IS COMPLETELY SUBMERGED BENEATH THE SURFACE OF SAID MEMBER, THEN COOLING SAID MEMBER AND THEREAFTER APPLYING A LAYER OF CESIATED ANTIMONY TO THE SURFACE OF SAID GLASS.
Claim 2
Independent Claim
76 words
THE METHOD OF FORMING A FLUORESCENT SCREEN WHICH COMPRISES COATING A SUPPORTING MEMBER CONSISTING OF A MIXTURE OF 0% TO 40% POTASSIUM OXIDE, 0% TO 60% ZINE OXIDE AND 100% TO 40% BORIC OXIDE WITH A THIN DRY LAYER OF ZINC SULPHIDE, HEATING SAID MEMBER UNTIL SAID ZINC SULPHIDE IS COMPLETELY SUBMERGED BENEATH THE SURFACE OF SAID MEMBER, THEN COOLING SAID MEMBER AND THEREAFTER APPLYING A LAYER OF CESIATED ANTIMONY TO THE SURFACE OF SAID GLASS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |