US3242369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp with a phosphor coating of platelike crystals
Assignee: The General Electric Company PLC
•
Filing: 1961-04-03
•
Granted: 1966-03-22
•
Expires: 1981-04-03
Abstract
No abstract record available.
Inventors
- 👤 King William Godfrey
- 👤 Leete Christopher Robin John
- 👤 Mckeag Alfred Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:50
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; C; C09; C09K; C09K11/00; C09K11/08; C09K11/0855; C09K11/0861; C09K11/0866
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A LOW PRESSURE MERCURY VAPOUR FLUORESCENT ELECTRIC DISCHARGE LAMP HAVING A DISCHARGE ENVELOPE, A COATING ON THE INTERIOR SURFACE OF SAID ENVELOPE WHICH COATING CONSTITUTES HALOPHOSPHATE PHOSPHOR CRYSTALS WHICH ARE SUBSTANTIALLY WHOLLY OF A PLATE-LIKE FORM, THE THICKNESS OF SAID CRYSTALS BEING SMALL AND THEIR OTHER DIMENSIONS BEING CONSIDERABLY LARGER, AND WHEREIN AT LEAST THE MAJORITY OF THE SAID CRYSTALS ARE ARRANGED WITH THEIR
Claim 2
Dependent Claim
65 words
IN A LOW PRESSURE MERCURY VAPOUR FLUORESCENT ELECTRIC DISCHARGE LAMP HAVING A DISCHARGE ENVELOPE, A COATING ON THE INTERIOR SURFACE OF SAID ENVELOPE WHICH COATING CONSTITUTES HALOPHOSPHATE PHOSPHOR CRYSTALS WHICH ARE SUBSTANTIALLY WHOLLY OF A PLATE-LIKE FORM, THE THICKNESS OF SAID CRYSTALS BEING SMALL AND THEIR OTHER DIMENSIONS BEING CONSIDERABLY LARGER, AND WHEREIN AT LEAST THE MAJORITY OF THE SAID CRYSTALS ARE ARRANGED WITH THEIR
References Cited (Backward Citations)
US2814748A
Cited
US2999070A
Cited
US3055767A
Cited
US2987414A
Cited
US3002933A
Cited
US2965786A
Cited
US3110560A
Cited
US3023339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |