Patent US3912828A successfully refreshed from Google Patents.
US3912828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precoat for reprographic lamps having oxide reflector coatings
Assignee: General Electric Co
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Filing: 1973-10-10
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Granted: 1975-10-14
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Expires: 1993-10-10
Abstract
Abstract A precoat is formed on the interior surface of a glass bulb for a fluorescent reprographic lamp by applying thereon a solution containing tetrabutyl titanate, aluminum-s-butoxide, and magnesium acetate, combined with tri-n-butyl antimonate and/or tri-n-butyl borate, along with suitable solvents and binders, and heating in a lehring operation. Preferably, acetic acid is included in the applied solution. An apertured reflector coating of an oxide composition, such as titanium dioxide, is applied onto the precoat within the bulb.
Inventors
- 👤 Ronald J Olwert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:20
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A METHOD OF TREATING THE INNER SURFACE OF A GLASS BULB FOR USE IN AN APERTURED FLUORESCENT REPROGRAPHIC LAMP HAVING AN OXIDE REFLECTOR COATING COMPRISING THE STEPS OF COATING SAID INNER SURFACE WITH A MIXTURE CONTAINING TETRABUTYL TITANATE, ALUMINUM-S-BUTOXIDE, AND MAGNESIUM ACETATE, COMBINED WITH TRI-N-BUTYL ANTIMONATE AND/OR TRI-N-BUTYL BORATE, ALONG WITH SOLVENT AND BINDER MATERIALS, AND HEATING SAID COATED BULB TO A TEMPERATURE OF ABOUT 500*C OR GREATER TO CAUSE SAID MIXTURE TO CHEMICALLY REACT WITH SAID GLASS.
Claim 2
Independent Claim
78 words
A METHOD OF TREATING THE INNER SURFACE OF A GLASS BULB FOR USE IN AN APERTURED FLUORESCENT REPROGRAPHIC LAMP HAVING AN OXIDE REFLECTOR COATING COMPRISING THE STEPS OF COATING SAID INNER SURFACE WITH A MIXTURE CONTAINING TETRABUTYL TITANATE, ALUMINUM-S-BUTOXIDE, AND MAGNESIUM ACETATE, COMBINED WITH TRI-N-BUTYL ANTIMONATE AND/OR TRI-N-BUTYL BORATE, ALONG WITH SOLVENT AND BINDER MATERIALS, AND HEATING SAID COATED BULB TO A TEMPERATURE OF ABOUT 500*C OR GREATER TO CAUSE SAID MIXTURE TO CHEMICALLY REACT WITH SAID GLASS.
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1 in which the constituents of said mixture are in approximately the following relative amounts: 5 ml tetrabutyl titanate 10 ml aluminum-s-butoxide 0.25 g magnesium acetate 0.5 ml tri-n-butyl antimonate.
Claim 4
Dependent Claim
35 words
A method as claimed in claim 2 further including the following relative amounts of solvent and binder materials: 125 ml butyl acetate 125 ml naphtha 250 ml butanol 40 ml ethyl cellulose 5 ml methanol.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 1 in which said mixture contains acetic acid.
Claim 6
Dependent Claim
40 words
A method as claimed in claim 4 in which the constituents of said mixture are in appproximately the following relative amounts: 5 ml tetrabutyl titanate 10 ml aluminum-s-butoxide 0.25 g magnesium acetate 0.5 ml tri-n-butyl antimonate 2.5 ml acetic acid.
Claim 7
Dependent Claim
35 words
A method as claimed in claim 5 further including the following relative amounts of solvent and binder materials: 125 ml butyl acetate 125 ml naphtha 250 ml butanol 40 ml ethyl cellulose 5 ml methanol.
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |