US2647086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of phosphor manufacture
Assignee: GTE Sylvania Inc
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Filing: 1950-03-01
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Granted: 1953-07-28
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Expires: 1970-03-01
Abstract
No abstract record available.
Inventors
- 👤 Horace H Homer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:32
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN THE METHOD OF MAKING A PHOSPHOR OF A TYPE TO WHICH OXIDATION IS DELETERIOUS, THE STEPS OF MIXING WITH THE INGREDIENTS NECESSARY TO FORM THE PHOSPHOR ABOUT 1/2% TO 1% BY WEIGHT OF A COMPOUND EASILY DECOMPOSABLE BY HEAT TO RELATIVELY INERT GASES FREE FROM ANY SOLID RESIDUE AND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM FORMATE, AMMONIUM OXALATE AND OXALIC ACID, AND FIRING THE RESULTANT MIXTURE TO FORM THE PHOSPHOR.
Claim 2
Dependent Claim
72 words
IN THE METHOD OF MAKING A PHOSPHOR OF A TYPE TO WHICH OXIDATION IS DELETERIOUS, THE STEPS OF MIXING WITH THE INGREDIENTS NECESSARY TO FORM THE PHOSPHOR ABOUT 1/2% TO 1% BY WEIGHT OF A COMPOUND EASILY DECOMPOSABLE BY HEAT TO RELATIVELY INERT GASES FREE FROM ANY SOLID RESIDUE AND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM FORMATE, AMMONIUM OXALATE AND OXALIC ACID, AND FIRING THE RESULTANT MIXTURE TO FORM THE PHOSPHOR.
References Cited (Backward Citations)
US2408621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |