US4778744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for providing high-intensity optical patterns in glass
Assignee: Corning Glass Works
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Filing: 1986-11-21
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Granted: 1988-10-18
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Expires: 2006-11-21
Abstract
Abstract A method for substantially increasing the refractive index change induced in porous glass through metal oxide deposition by photolysis of organometallic compounds present therein, according to which the photolyzed glass is re-impregnated with additional organometallic compounds which undergo decomposition reactions catalyzed by the photolyzed organometallics or oxides resulting from the initial photolysis step. Enhancements of ten times the original refractive index change are attainable.
Inventors
- 👤 Nicholas F. Borrelli
- 👤 John C. Luong
- 👤 Paul A. Sachenik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:10
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/56; C; C03; C03C; C03C23/00; C03C23/0095; G03C1/00; G03C1/72; G03C1/73; G03C1/735
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A method for producing an optical pattern in glass which comprises the steps of: (a) impregnating a porous glass article with a photolyzable organometallic compound of a first metal; (b) exposing the article to a patterning source of radiation to chemically convert at least some of the photolyzable organometallic compound in exposed areas thereof to metal-containing intermediates which are stable against migration in the pores of the article; (c) removing unreacted photolyzable organometallic compound of the first metal from the pores of the article; (d) impregnating the pores of the article with a catalytically decomposable organometallic compound of a second metal, said organometallic compound being one which is catalytically decomposable to an oxide or an oxide precursor of the second metal in the presence of the metal-containing intermediates, thereby depositing said oxide and oxide precursor in said exposed areas; and (e) removing from the pores of the article catalytically decomposable organometallic compound of the second metal not catalytically decomposed.
Claim 2
Independent Claim
159 words
A method for producing an optical pattern in glass which comprises the steps of: (a) impregnating a porous glass article with a photolyzable organometallic compound of a first metal; (b) exposing the article to a patterning source of radiation to chemically convert at least some of the photolyzable organometallic compound in exposed areas thereof to metal-containing intermediates which are stable against migration in the pores of the article; (c) removing unreacted photolyzable organometallic compound of the first metal from the pores of the article; (d) impregnating the pores of the article with a catalytically decomposable organometallic compound of a second metal, said organometallic compound being one which is catalytically decomposable to an oxide or an oxide precursor of the second metal in the presence of the metal-containing intermediates, thereby depositing said oxide and oxide precursor in said exposed areas; and (e) removing from the pores of the article catalytically decomposable organometallic compound of the second metal not catalytically decomposed.
Claim 3
Dependent Claim
37 words
A method in accordance with claim 1 wherein the photolyzable organometallic compound is a compound of a metal selected from the group consisting of Groups IIIB, IVA, IVB, VB, VIB, VIIB and VIII of the Periodic Table.
Claim 4
Dependent Claim
13 words
A method in accordance with claim 1 wherein the radiation is ultraviolet light.
Claim 5
Dependent Claim
19 words
A method in accordance with claim 1 wherein the catalytically decomposable organometallic compound is a catalytically oxidizable organotin compound.
Claim 6
Dependent Claim
15 words
A method in accordance with claim 4 wherein the catalytically oxidizable compound is tetraallyl tin.
Claim 7
Dependent Claim
37 words
A method in accordance with claim 4 wherein the step of impregnating the pores of the article with a catalytically oxidizable organotin compound comprises impregnating the pores of the article with a liquid solution of the compound.
Claim 8
Dependent Claim
29 words
A method in accordance with claim 1 wherein the step of removing catalytically decomposable organometallic compound from the glass comprises rinsing the glass with a solvent for the compound.
Claim 9
Dependent Claim
40 words
A method in accordance with claim 1 which comprises the additional step, after removing catalytically decomposable organometallic compound from the pores of the glass, of sealing at least the surface pores of the porous glass article against further material transport.
References Cited (Backward Citations)
US2326012A
Cited
US2422472A
Cited
US4110093A
Cited
GB1519701A
Cited
US4017318A
Cited
US4403031A
Cited
US4488864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |