Patent US3941715A successfully refreshed from Google Patents.
US3941715A
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Substituted zirconium pyrophosphate phosphors
Assignee: RCA Licensing Corp
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Filing: 1975-03-24
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Granted: 1976-03-02
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Expires: 1995-03-24
Abstract
Abstract Self-activated ultraviolet-emitting zirconium pyrophosphate phosphors, wherein 0.01 to 20 mole percent of the zirconium is substituted with one or more of hafnium, germanium and silicon. The phosphors, which may be excited by ultraviolet radiation, x-rays and electron beams, may be used as energy converters in photodevices.
Inventors
- 👤 Igal Shidlovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:27
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
56 words
A luminescent material consisting essentially of Zr 1 -x M x P 2 O 7 , wherein M is at least one of Hf, Ge and Si, and x is in the range of 0.0001 and 0.20, said luminescent material having a cathodoluminescent power efficiency greater than that of unsubstituted self-activated ZrP 2 O 7 phosphor.
Claim 2
Dependent Claim
56 words
A luminescent material consisting essentially of Zr 1 -x M x P 2 O 7 , wherein M is at least one of Hf, Ge and Si, and x is in the range of 0.0001 and 0.20, said luminescent material having a cathodoluminescent power efficiency greater than that of unsubstituted self-activated ZrP 2 O 7 phosphor.
Claim 3
Dependent Claim
17 words
The luminescent material defined in claim 1, wherein x is in the range of 0.001 to .01.
Claim 4
Dependent Claim
11 words
The luminescent material defined in claim 1, wherein M is Hf.
Claim 5
Dependent Claim
11 words
The luminescent material defined in claim 1, wherein M is Ge.
Claim 6
Dependent Claim
11 words
The luminescent material defined in claim 1, wherein M is Si.
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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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |