Patent US2545880A successfully refreshed from Google Patents.
US2545880A
Expired / Lapsed
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Nonphosphorescent calcium silicate phosphor containing indium
Assignee: General Electric Co
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Filing: 1950-02-27
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Granted: 1951-03-20
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Expires: 1970-02-27
Abstract
No abstract record available.
Inventors
- 👤 Herman C Froelich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:59
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0838; C09D; C09D5/00; C09D5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF CALCIUM SILICATE ACTIVATED WITH METAL OF THE GROUP CONSISTING OF MANGANESE ALONE AND MIXTURES OF MANGANESE AND LEAD, AND AN INHIBITOR OF PHOSPHORESCENCE CONSISTING OF INDIUM IN AN AMOUNT OF ABOUT .01 TO 1 PER CENT BY WEIGHT OF THE TOTAL COMPOSITION.
Claim 2
Dependent Claim
48 words
A LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF CALCIUM SILICATE ACTIVATED WITH METAL OF THE GROUP CONSISTING OF MANGANESE ALONE AND MIXTURES OF MANGANESE AND LEAD, AND AN INHIBITOR OF PHOSPHORESCENCE CONSISTING OF INDIUM IN AN AMOUNT OF ABOUT .01 TO 1 PER CENT BY WEIGHT OF THE TOTAL COMPOSITION.
References Cited (Backward Citations)
US2299510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |