US3058866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a light-diffusing layer on glass surfaces, especially on the inside of electric lamp envelopes
Assignee: LUMA LAMPAN AB
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Filing: 1959-07-08
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Granted: 1962-10-16
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Expires: 1979-07-08
Abstract
No abstract record available.
Inventors
- 👤 Gunther Gunnar Georg Johan
- 👤 Rosengren Gosta Birger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:02
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/005; C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C09; C09K; C09K11/00; C09K11/02; C09K11/025; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/212; C03C2217/213; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152; C03C2218/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A METHOD OF PROVIDING A LIGHT-DIFFUSING SURFACE ON THE INSIDE OF GLASS BULBS FOR ELECTRIC LAMPS, WHICH SURFACE COMPRISING AN ETCHED AREA ON THE INSIDE OF SAID GLASS BULB HAVING DEPOSITED AND ADHERED THEREON FINELY DIVIDED LIGHT DIFFUSING PARTICLES SELECTED FROM THE GROUP CONSISTING OF OXIDES OF TITANIUM AND SILICON, THE STEPS WHICH COMPRISE ETCHING SAID INSIDE SURFACE OF SAID GLASS BULB WITH HOT GASEOUS HYDROGEN FLUORIDE, DEPOSITING ON SAID ETCHED SURFACE HOT FINELY DIVIDED PARTICLES OF SAID LIGHT-DIFFUSING MATERIAL, AND MAINTAINING AT LEAST SAID INSIDE SURFACE OF SAID GLASS BULB HEATED TO AN ELEVATED TEMPERATURE THROUGHOUT SAID ETCHING AND DEPOSITING STEPS.
Claim 2
Dependent Claim
103 words
IN A METHOD OF PROVIDING A LIGHT-DIFFUSING SURFACE ON THE INSIDE OF GLASS BULBS FOR ELECTRIC LAMPS, WHICH SURFACE COMPRISING AN ETCHED AREA ON THE INSIDE OF SAID GLASS BULB HAVING DEPOSITED AND ADHERED THEREON FINELY DIVIDED LIGHT DIFFUSING PARTICLES SELECTED FROM THE GROUP CONSISTING OF OXIDES OF TITANIUM AND SILICON, THE STEPS WHICH COMPRISE ETCHING SAID INSIDE SURFACE OF SAID GLASS BULB WITH HOT GASEOUS HYDROGEN FLUORIDE, DEPOSITING ON SAID ETCHED SURFACE HOT FINELY DIVIDED PARTICLES OF SAID LIGHT-DIFFUSING MATERIAL, AND MAINTAINING AT LEAST SAID INSIDE SURFACE OF SAID GLASS BULB HEATED TO AN ELEVATED TEMPERATURE THROUGHOUT SAID ETCHING AND DEPOSITING STEPS.
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) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |