US3366573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated phosphor having radioisotope dispersed therein and method of preparation
Assignee: Canrad Precision Industries Inc
•
Filing: 1965-10-24
•
Granted: 1968-01-30
•
Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Feuer Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:52
CPC Classifications
G; G09; G09F; G09F3/00; C; C09; C09K; C09K11/00; C09K11/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A RADIOACTIVATED PHOSPHOR, COMPRISING A BODY OF INORGANIC LIGHT EMITTING PHOSPHOR HAVING EMBEDDED AND DISTRIBUTED THEREIN PARTICLES OF A RADIOACTIVE ISOTOPE, AND BEING COATED WITH A NON-RADIOACTIVE TRANSPARENT LAYER.
Claim 2
Dependent Claim
29 words
A RADIOACTIVATED PHOSPHOR, COMPRISING A BODY OF INORGANIC LIGHT EMITTING PHOSPHOR HAVING EMBEDDED AND DISTRIBUTED THEREIN PARTICLES OF A RADIOACTIVE ISOTOPE, AND BEING COATED WITH A NON-RADIOACTIVE TRANSPARENT LAYER.
Claim 3
Dependent Claim
47 words
METHOD OF PRODUCING RADIOACTIVE PHOSPHORS, WHICH COMPRISES DEPOSITING A RADIOACTIVE ISOTOPE ON AN INORGANIC PHOSPHORE, HEATING THE THUS OBTAINED MATERIAL AT A TEMPERATURE SUFFICIENTLY HIGH TO CAUSE THERMAL DIFFUSION OF SAID RADIOACTIVE ISOTOPE INTO SAID PHOSPHOR, AND THEREAFTER COATING SAID RADIOACTIVE PHOSPHOR WITH A NONRADIOACTIVE TRANSPARENT LAYER.
Claim 4
Dependent Claim
47 words
METHOD OF PRODUCING RADIOACTIVE PHOSPHORS, WHICH COMPRISES DEPOSITING A RADIOACTIVE ISOTOPE ON AN INORGANIC PHOSPHORE, HEATING THE THUS OBTAINED MATERIAL AT A TEMPERATURE SUFFICIENTLY HIGH TO CAUSE THERMAL DIFFUSION OF SAID RADIOACTIVE ISOTOPE INTO SAID PHOSPHOR, AND THEREAFTER COATING SAID RADIOACTIVE PHOSPHOR WITH A NONRADIOACTIVE TRANSPARENT LAYER.
References Cited (Backward Citations)
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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) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |