US3322682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rare earth oxide and vanadate phosphors
Assignee: American Potash and Chemical Corp
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Filing: 1965-04-23
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Granted: 1967-05-30
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Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 George L Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:21
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7783; C09K11/7784; C09K11/7787; C09K11/7766; C09K11/7776
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PHOSPHOR CONSISTING ESSENTIALLY OF: (1) A MATRIX SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF YTTRIUM OXIIDE, LANTHANUM OXIDE, GADOLINIUM OXIDE, YTTRIUM VANADATE, LANTHANUM VANADATE, AND GADOLINIUM VANADATE, AND (2) A DOPANT CONSISTING OF FROM 1 TO 10 WEIGHT PERCENT OF EUROPIUM AND FROM 10 P.P.M. TO 1,000 P.P.M. OF AT LEAST ONE OF CERIUM, PRASEODYMIUM, NEODYMIUM, SAMARIUM, GADOLINIUM, TERBIUM, DYSPROSIUM, HOLMIUM, ERBIUM, THULIUM, YTTERBIUM, LUTETIUM AND LANTHANUM IONS, EACH OF SAID DOPANT IONS BEING DIFFERENT FRM THE METALLIC ION OF SAID MATRIX.
Claim 2
Dependent Claim
86 words
A PHOSPHOR CONSISTING ESSENTIALLY OF: (1) A MATRIX SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF YTTRIUM OXIIDE, LANTHANUM OXIDE, GADOLINIUM OXIDE, YTTRIUM VANADATE, LANTHANUM VANADATE, AND GADOLINIUM VANADATE, AND (2) A DOPANT CONSISTING OF FROM 1 TO 10 WEIGHT PERCENT OF EUROPIUM AND FROM 10 P.P.M. TO 1,000 P.P.M. OF AT LEAST ONE OF CERIUM, PRASEODYMIUM, NEODYMIUM, SAMARIUM, GADOLINIUM, TERBIUM, DYSPROSIUM, HOLMIUM, ERBIUM, THULIUM, YTTERBIUM, LUTETIUM AND LANTHANUM IONS, EACH OF SAID DOPANT IONS BEING DIFFERENT FRM THE METALLIC ION OF SAID MATRIX.
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |