US3114067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp particularly suited to illumination of objects containing red
Assignee: EMI Group Ltd
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Filing: 1960-06-24
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Granted: 1963-12-10
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Expires: 1980-06-24
Abstract
No abstract record available.
Inventors
- 👤 Henderson Stanley Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7715; C09K11/7726; C09K11/66; C09K11/67; C09K11/68; C09K11/74; C09K11/75; C09K11/76; H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A LOW PRESSURE FLUORESCENT LAMP COMPRISING A SEALED LIGHT-TRANSMITTING ENVELOPE, A FILLING OF MERCURY AND AN INERT GAS THEREIN, A PHOSPHOR COATING ON THE INSIDE OF SAID ENVELOPE, SAID PHOSPHOR COATING CONSISTING ESSENTIALLY OF AT LEAST 15% BY WEIGHT OF A FIRST LIMINESCENT MATERIAL HAVING AN EMISSION PEAK IN THE REGION 6500-6700 A. AT LEAST 15% OF A SECOND LUMINESCENT MATERIAL HAVING AN EMISSION PEAK IN THE REGION 6000-6500 A., THE FIRST AND SECOND MATERIALS AMOUNTING IN TOTAL TO NOT MORE THAN 70% BY WEIGHT OF THE COATING, AND AT LEAST ONE FURTHER LUMINESCENT MATERIAL EMITTING OVER A WIDE BAND INCLUDING THE BLUE REGION OF THE SPECTRUM AND HAVING ITS EMISSION PEAK AT A WAVELENGTH BELOW THE PREVIOUSLY-MENTIONED REGIONS OF WAVELENGTHS, AND BEING PRESENT IN THE PHOSPHOR IN AN AMOUNT AT LEAST 15% BY WEIGHT OF THE PHOSPHOR.
Claim 2
Dependent Claim
138 words
A LOW PRESSURE FLUORESCENT LAMP COMPRISING A SEALED LIGHT-TRANSMITTING ENVELOPE, A FILLING OF MERCURY AND AN INERT GAS THEREIN, A PHOSPHOR COATING ON THE INSIDE OF SAID ENVELOPE, SAID PHOSPHOR COATING CONSISTING ESSENTIALLY OF AT LEAST 15% BY WEIGHT OF A FIRST LIMINESCENT MATERIAL HAVING AN EMISSION PEAK IN THE REGION 6500-6700 A. AT LEAST 15% OF A SECOND LUMINESCENT MATERIAL HAVING AN EMISSION PEAK IN THE REGION 6000-6500 A., THE FIRST AND SECOND MATERIALS AMOUNTING IN TOTAL TO NOT MORE THAN 70% BY WEIGHT OF THE COATING, AND AT LEAST ONE FURTHER LUMINESCENT MATERIAL EMITTING OVER A WIDE BAND INCLUDING THE BLUE REGION OF THE SPECTRUM AND HAVING ITS EMISSION PEAK AT A WAVELENGTH BELOW THE PREVIOUSLY-MENTIONED REGIONS OF WAVELENGTHS, AND BEING PRESENT IN THE PHOSPHOR IN AN AMOUNT AT LEAST 15% BY WEIGHT OF THE PHOSPHOR.
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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |