US3141990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp having a tio2 coating on the inner surface of the bulb
Assignee: GTE Sylvania Inc
•
Filing: 1962-05-15
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Granted: 1964-07-21
•
Expires: 1982-05-15
Abstract
No abstract record available.
Inventors
- 👤 John G Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:57
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; C; C09; C09K; C09K11/00; C09K11/02; C09K11/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A FLUOROSCENT LAMP COMPRISING: A GLASS ENVELOPE, MERCURY VAPOR AND MEANS TO PRODUCE AN ELECTRIC DISCHARGE IN SAID ENVELOPE; A TRANSPARENT BARRIER LAYER OF SUBSTANTIALLY ALKALI-FREE TIO2 DISPOSED UPON AND ADHERING TO THE INNER SURFACE OF SAID GLASS ENVELOPE; A PHOSPHOR COATING IN SAID LAMP EXTENDING PART WAY ONLY AROUND THE INNER SURFACE THEREOF, SO AS TO LEAVE A CLEAR SLOT THROUGH WHICH LIGHT MAY EMERGE.
Claim 2
Dependent Claim
66 words
A FLUOROSCENT LAMP COMPRISING: A GLASS ENVELOPE, MERCURY VAPOR AND MEANS TO PRODUCE AN ELECTRIC DISCHARGE IN SAID ENVELOPE; A TRANSPARENT BARRIER LAYER OF SUBSTANTIALLY ALKALI-FREE TIO2 DISPOSED UPON AND ADHERING TO THE INNER SURFACE OF SAID GLASS ENVELOPE; A PHOSPHOR COATING IN SAID LAMP EXTENDING PART WAY ONLY AROUND THE INNER SURFACE THEREOF, SO AS TO LEAVE A CLEAR SLOT THROUGH WHICH LIGHT MAY EMERGE.
References Cited (Backward Citations)
US2104073A
Cited
US3058866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |