US2835636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cerium-activated magnesium metaphosphate phosphor, with and without manganese
Assignee: Westinghouse Electric Corp
•
Filing: 1954-01-07
•
Granted: 1958-05-20
•
Expires: 1974-01-07
Abstract
No abstract record available.
Inventors
- 👤 Henry W Rimbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7715; C09K11/7723; C09K11/7724
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PHOSPHOR FOR FLUORESCENT LAMPS CONSISTING OF THE FIRES REACTION PRODUCT OF FOLLOWING CONSTITUENTS IN ABOUT THE STATED PROPORTIONS BY WEIGHT: MAGNESIUM CARBONATE, 202 PARTS; DI-AMMONOUM ACID PHOSPHATE, FROM 745 TO 871 PARTS; MANGANESE PYROPHOSPHATE, FROM 0 TO 110 PARTS; AND CERIUM PHOSPHATE FROM 93 TO 0 PARTS, AND IN WHICH ONLY ONE OF THE MANGANESE AND CERIUM COMPOUNDS IS ZERO, SAID PHOSPHOR HAVING BEEN FIRED IN AN OXYGENCONTAINING ATMOSPHERE AT A TEMPERATURE IN THE RANGE OF 700*C. TO 800*C.
Claim 2
Dependent Claim
80 words
A PHOSPHOR FOR FLUORESCENT LAMPS CONSISTING OF THE FIRES REACTION PRODUCT OF FOLLOWING CONSTITUENTS IN ABOUT THE STATED PROPORTIONS BY WEIGHT: MAGNESIUM CARBONATE, 202 PARTS; DI-AMMONOUM ACID PHOSPHATE, FROM 745 TO 871 PARTS; MANGANESE PYROPHOSPHATE, FROM 0 TO 110 PARTS; AND CERIUM PHOSPHATE FROM 93 TO 0 PARTS, AND IN WHICH ONLY ONE OF THE MANGANESE AND CERIUM COMPOUNDS IS ZERO, SAID PHOSPHOR HAVING BEEN FIRED IN AN OXYGENCONTAINING ATMOSPHERE AT A TEMPERATURE IN THE RANGE OF 700*C. TO 800*C.
References Cited (Backward Citations)
US2241951A
Cited
GB609711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |