Patent US2497140A successfully refreshed from Google Patents.
US2497140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of luminescent materials
Assignee: GTE Sylvania Inc
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Filing: 1946-03-28
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Granted: 1950-02-14
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Expires: 1966-03-28
Abstract
No abstract record available.
Inventors
- 👤 James H Schulman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:32
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0838
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS OF PREPARING A MANAGEMENT ACTIVATED SILICATE PHOSPHOR SELECTED FROM THE GROUP CONSISTING OF ZINC ORTHOSILICATE, ZINC BERYLIUM SILICATE, MAGNESIUM ORTHOSILICATE, CADMIUM SILICATE AND CALCIUM SILICATE WHICH COMPRISES DISPOSING THE COMPONENTS THEREOF, IN THE SOLID STATE, IN THE PROPORTIONS NECESSARY TO FORM THE PHOSPHOR, IN AN ENCLOSED CHAMBER; DISPOSING AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF CDCL2, ZNCL2, HGC1, PBCL2, PBF2, PBO, AND PBO2, IN THE SOLID STATE, IN SAID CHAMBER, PHYSICALLY SEPARATE FROM SAID COMPONENTS BUT IN CLOSE PROXIMITY THERETO; AND HEATING SAID COMPONENTS AND SAID COMPOUND TO A TEMPERATURE HIGH ENOUGH TO VAPORIZE SAID COMPOUND AND CAUSE SAID VAPORS TO PERMEATE THE SOLID STATE COMPONENTS OF SAID PHOSPHOR.
Claim 2
Dependent Claim
114 words
THE PROCESS OF PREPARING A MANAGEMENT ACTIVATED SILICATE PHOSPHOR SELECTED FROM THE GROUP CONSISTING OF ZINC ORTHOSILICATE, ZINC BERYLIUM SILICATE, MAGNESIUM ORTHOSILICATE, CADMIUM SILICATE AND CALCIUM SILICATE WHICH COMPRISES DISPOSING THE COMPONENTS THEREOF, IN THE SOLID STATE, IN THE PROPORTIONS NECESSARY TO FORM THE PHOSPHOR, IN AN ENCLOSED CHAMBER; DISPOSING AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF CDCL2, ZNCL2, HGC1, PBCL2, PBF2, PBO, AND PBO2, IN THE SOLID STATE, IN SAID CHAMBER, PHYSICALLY SEPARATE FROM SAID COMPONENTS BUT IN CLOSE PROXIMITY THERETO; AND HEATING SAID COMPONENTS AND SAID COMPOUND TO A TEMPERATURE HIGH ENOUGH TO VAPORIZE SAID COMPOUND AND CAUSE SAID VAPORS TO PERMEATE THE SOLID STATE COMPONENTS OF SAID PHOSPHOR.
References Cited (Backward Citations)
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US2124225A
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US2238026A
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US2254956A
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US2247192A
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US2299510A
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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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |