US2656320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc silicate phosphor
Assignee: Westinghouse Electric Corp
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Filing: 1948-05-12
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Granted: 1953-10-20
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Expires: 1968-05-12
Abstract
No abstract record available.
Inventors
- 👤 Nagy Rudolph
- 👤 Robert W Wollentin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:36
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0838
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A MANGANESE-ACTIVATED ZINC SILICATE PHOSPHOR FOR FLUORESCENT LAMPS ADDITIONALLY ACTIVATED BY ONE OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM AND ZIRCONIUM IN MOLE PROPORTIONS ABOUT .005 TO 10 AND ABOUT .005 TO .20, RESPECTIVELY.
Claim 2
Dependent Claim
37 words
A MANGANESE-ACTIVATED ZINC SILICATE PHOSPHOR FOR FLUORESCENT LAMPS ADDITIONALLY ACTIVATED BY ONE OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM AND ZIRCONIUM IN MOLE PROPORTIONS ABOUT .005 TO 10 AND ABOUT .005 TO .20, RESPECTIVELY.
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |