US3847643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of fluorescent lamp bulbs and other glass objects
Assignee: General Electric Co
•
Filing: 1973-01-22
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Granted: 1974-11-12
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Expires: 1993-01-22
Abstract
Abstract A solution containing tetrabutyl titanate and aluminum-sbutoxide combined with tri-n-butyl antimonite and/or tri-n-butyl borate, along with suitable solvents such as butyl acetate and binders such as ethyl cellulose, is applied to a glass surface such as that of a fluorescent lamp bulb. Upon air heating to a temperature of 400* C or greater, the glass surface characteristics are improved by becoming harder and stronger. When such a treatment is applied to the interior of a fluorescent lamp bulb, the treated glass surface also acts as a barrier against alkali materials within the glass and also improves phosphor adherence. When the treated bulb is made into a fluorescent lamp, improved phosphor maintenance and less end darkening are realized.
Inventors
- 👤 E Hammer
- 👤 W Martyny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:50
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/25; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/11
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
A METHOD OF TREATING GLASS, COMPRISING THE STEPS OF APPLYING TO THE GLASS SURFACE A MIXTURE CONTAINING ALUMINUM-SBUTOXIDE AND TETRABUTYL TITANATE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF TRI-N-BUTYL BORATE AND TRI-N-BUTYL ANTIMONITE AND A MIXTURE THEREOF, AND HEATING SAID GLASS AND MIXTURE TO A TEMPERATURE OF AT LEAST 400*C, THE AMOUNT OF ALUMINUM-S-BUTOXIDE IN SAID MIXTURE BEING SUFFICIENT TO CAUSE EXCESS ALUMINUM OXIDE TO BE PRODUCED AND CAUSING SAID MIX-
Claim 2
Independent Claim
73 words
A METHOD OF TREATING GLASS, COMPRISING THE STEPS OF APPLYING TO THE GLASS SURFACE A MIXTURE CONTAINING ALUMINUM-SBUTOXIDE AND TETRABUTYL TITANATE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF TRI-N-BUTYL BORATE AND TRI-N-BUTYL ANTIMONITE AND A MIXTURE THEREOF, AND HEATING SAID GLASS AND MIXTURE TO A TEMPERATURE OF AT LEAST 400*C, THE AMOUNT OF ALUMINUM-S-BUTOXIDE IN SAID MIXTURE BEING SUFFICIENT TO CAUSE EXCESS ALUMINUM OXIDE TO BE PRODUCED AND CAUSING SAID MIX-
Claim 3
Dependent Claim
15 words
A method as claimed in claim 1, in which said temperature is approximately 600* C.
Claim 4
Dependent Claim
27 words
A method as claimed in claim 1, in which the amount of aluminum-s-butoxide in said mixture is approximately twice that of said other materials in the mixture.
Claim 5
Dependent Claim
32 words
A method as claimed in claim 1, in which an ethyl cellulose binder is combined with said mixture to prevent premature hydrolysis of the mixture materials prior to said step of heating.
Claim 6
Independent Claim
101 words
A method of treating a glass bulb for an electrical device, comprising the steps of applying to at least one of the inner and outer surfaces of the bulb a mixture containing aluminum-s-butoxide and tetrabutyl titanate and a material selected from the group consisting of tri-n-butyl borate and tri-n-butyl antimonite and a mixture thereof, and heating said bulb and mixture to a tempeRature of at least 400* C, the amount of aluminum-s-butoxide in said mixture being sufficient to cause aluminum oxide to be produced and causing said mixture to chemically react with the glass of said bulb during said heating step.
Claim 7
Independent Claim
101 words
A method of treating a glass bulb for an electrical device, comprising the steps of applying to at least one of the inner and outer surfaces of the bulb a mixture containing aluminum-s-butoxide and tetrabutyl titanate and a material selected from the group consisting of tri-n-butyl borate and tri-n-butyl antimonite and a mixture thereof, and heating said bulb and mixture to a tempeRature of at least 400* C, the amount of aluminum-s-butoxide in said mixture being sufficient to cause aluminum oxide to be produced and causing said mixture to chemically react with the glass of said bulb during said heating step.
Claim 8
Dependent Claim
15 words
A method as claimed in claim 5, in which said temperature is approximately 600* C.
Claim 9
Dependent Claim
24 words
A method as claimed in claim 1, in which said amount of aluminum-s-butoxide is approximately twice that of said other materials in the mixture.
Claim 10
Dependent Claim
31 words
A method as claimed in claim 1, in which an ethyl cellulose binder is combined with said mixture to prevent hydrolysis of the mixture materials prior to said step of heating.
Claim 11
Dependent Claim
62 words
A method as claimed in claim 1, in which said bulb is a fluorescent lamp bulb, and including the step of applying a phosphor coating inside said bulb after applying said mixture to the inside of the bulb and prior to said heating, whereby said heating causes a chemical reaction of said mixture with the glass bulb and also lehrs the phosphor.
Claim 12
Dependent Claim
22 words
A method as claimed in claim 9, in which butanol is combined with said mixture to facilitate the adherence of said phosphor.
Claim 13
Dependent Claim
32 words
A method as claimed in claim 9, in which an ethyl cellulose binder is combined with said mixture to prevent premature hydrolysis of the mixture materials prior to said step of heating.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |