US3002933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of halophosphate phosphor manufacture
Assignee: GTE Sylvania Inc
•
Filing: 1958-12-10
•
Granted: 1961-10-03
•
Expires: 1978-12-10
Abstract
No abstract record available.
Inventors
- 👤 Horace H Homer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:21
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/74; C09K11/75; C09K11/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN THE MANUFACTURE IN A FURNACE OF POWERED HALOPHOSPHATE PHOSPHORS, ANTIMONY AND MANGANESE ACTIVATED, FROM A MIXTURE OF POWDERED RAW MATERIALS CONTAINING COMPOUNDS OF ANTIMONY, OF MANGANESE, AND OF CHLORINE, THE STEPS OF PLACING A CHARGE OF SUCH RAW MATERIALS IN AN UNCOVERED BOAT TO A LEVEL SUFFICIENTLY BELOW THAT OF THE TOP OF THE BOAT TO ALLOW ROOM FOR THE ACCUMULATION OF AN ATMOSPHERE OF ANTIMONY CHLORIDE ABOVE THE PHOSPHOR, FLOWING A SUBSTANTIALLY INERT GAS INTO THE FURNACE AND FIRING THE MATERIALS AT HIGH TEMPERATURE, WHILE SAID UNCOVERED BOAT IS OPEN TO THE GASES OF SAID FURNACE.
Claim 2
Dependent Claim
98 words
IN THE MANUFACTURE IN A FURNACE OF POWERED HALOPHOSPHATE PHOSPHORS, ANTIMONY AND MANGANESE ACTIVATED, FROM A MIXTURE OF POWDERED RAW MATERIALS CONTAINING COMPOUNDS OF ANTIMONY, OF MANGANESE, AND OF CHLORINE, THE STEPS OF PLACING A CHARGE OF SUCH RAW MATERIALS IN AN UNCOVERED BOAT TO A LEVEL SUFFICIENTLY BELOW THAT OF THE TOP OF THE BOAT TO ALLOW ROOM FOR THE ACCUMULATION OF AN ATMOSPHERE OF ANTIMONY CHLORIDE ABOVE THE PHOSPHOR, FLOWING A SUBSTANTIALLY INERT GAS INTO THE FURNACE AND FIRING THE MATERIALS AT HIGH TEMPERATURE, WHILE SAID UNCOVERED BOAT IS OPEN TO THE GASES OF SAID FURNACE.
References Cited (Backward Citations)
US2755254A
Cited
US2672451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |