Patent US492782A successfully refreshed from Google Patents.
Patent US4293439A successfully refreshed from Google Patents.
US4293439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelled solder glass suspensions for sealing glass or ceramic parts
Assignee: Corning Glass Works
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Filing: 1980-10-03
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Granted: 1981-10-06
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Expires: 2000-10-03
Abstract
Abstract A solder glass suspension for sealing glass or other ceramic parts is provided having the characteristics of a reversible gel, exhibiting high viscosity during storage and after extrusion onto a sealing surface, but relatively low viscosity under shear stress during extrusion. The use of the suspension for sealing glass or ceramic parts is also described.
Inventors
- 👤 Daniel W. Corbett
- 👤 Donald L. Guile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:49
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/003; C04B37/005; C03; C03C; C03C27/00; C03C27/06; C03C27/10; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/6325; C04B35/634; C04B35/63404; C04B35/63444; C04B35/636; C04B35/6365; C04B37/008; C04B37/04; C04B37/045; C04B37/047; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/50; C04B2237/52
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
150 words
A solder glass suspension having the characteristics of a reversible gel, suitable for the application of fritted solder glass to the surface of a glass or ceramic part to be sealed, which comprises: an organic vehicle consisting essentially of a cellulose binder and an organic solvent for the binder; a fritted solder glass; and a gelling agent in a proportion at least sufficient to render the solder glass suspension essentially non-settling and non-sagging under the influence of gravity, while permitting said suspension after it is sheared by remixing or dispensing to become relatively flowable and readily extrudable onto a sealing surface, yet while permitting said suspension after extrusion to rapidly regel to retain its extruded shape and to be essentially non-flowable, non-settling and non-sagging under the influence of gravity, the gelling agent being one which does not adversely affect the sealing process or the mechanical integrity of the final seal.
Claim 2
Dependent Claim
150 words
A solder glass suspension having the characteristics of a reversible gel, suitable for the application of fritted solder glass to the surface of a glass or ceramic part to be sealed, which comprises: an organic vehicle consisting essentially of a cellulose binder and an organic solvent for the binder; a fritted solder glass; and a gelling agent in a proportion at least sufficient to render the solder glass suspension essentially non-settling and non-sagging under the influence of gravity, while permitting said suspension after it is sheared by remixing or dispensing to become relatively flowable and readily extrudable onto a sealing surface, yet while permitting said suspension after extrusion to rapidly regel to retain its extruded shape and to be essentially non-flowable, non-settling and non-sagging under the influence of gravity, the gelling agent being one which does not adversely affect the sealing process or the mechanical integrity of the final seal.
Claim 3
Dependent Claim
32 words
A solder glass suspension in accordance with claim 1 wherein the gelling agent is an inorganic agent selected from the group consisting of colloidal silica, bentonite clay, kaolinite clay, and attapulgus clay.
Claim 4
Dependent Claim
30 words
A solder glass suspension in accordance with claim 1 wherein the gelling agent is an organic agent selected from the group consisting of acetic acid, lecithin, and the flocculating surfactants.
Claim 5
Dependent Claim
29 words
A solder glass suspension in accordance with claim 3 wherein the flocculating surfactant is selected from the group consisting of fluorocarbon surfactants, lauryl sulphate surfactants, and surface-active organic titanates.
Claim 6
Dependent Claim
14 words
A solder glass suspension in accordance with claim 1 which comprises a nitrocellulose binder.
Claim 7
Dependent Claim
93 words
A solder glass suspension in accordance with claim 5 wherein the gelling agent is a titanate coupling agent of the formula: (RO).sub.x -Ti-[OX-(R.sup.2).sub.1-2 ].sub.4-x wherein RO is a coupling group consisting of an oxyacetate group or an alkoxy or aryloxy group of from 2-10 carbon atoms, Ti is tetravalent titanium, x is 1 or 2, corresponding to the number of titanium bonding sites occupied by RO coupling groups, OX is a carboxy, phosphato or pyrophosphato binding group, and R 2 is an aliphatic or aromatic hydrocarbon backbone group of from 6-20 carbon atoms.
Claim 8
Dependent Claim
21 words
A solder glass suspension in accordance with claim 6 wherein the gelling agent is titanium di(dioctylpyrophosphate) oxyacetate of the formula: ##STR5##
Claim 9
Dependent Claim
21 words
A solder glass suspension in accordance with claim 6 wherein the gelling agent is isopropyl tri(dioctylpyrophosphato) titanate of the formula: ##STR6##
Claim 10
Dependent Claim
21 words
A solder glass suspension in accordance with claim 6 wherein the gelling agent is isopropyl tri(dioctylphosphato) titanate of the formula: ##STR7##
Claim 11
Dependent Claim
21 words
A solder glass suspension in accordance with claim 6 wherein the gelling agent is isopropyl triisostearyol titanate of the formula: ##STR8##
Claim 12
Dependent Claim
16 words
A solder glass suspension in accordance with claim 2 wherein the gelling agent is colloidal silica.
Claim 13
Independent Claim
157 words
A method for extending the useful life of a solder glass suspension, the solder glass suspension comprising a fritted solder glass in an organic vehicle and the organic vehicle consisting essentially of a cellulose binder and an organic solvent for the binder, which comprises the step of: adding a gelling agent to the suspension to impart a reversibly gelled structure thereto, the gelling agent being added in a proportion at least sufficient to render the suspension essentially non-settling and non-sagging under the influence of gravity, while permitting said suspension after it is sheared by remixing or dispensing to become relatively flowable and readily extrudable onto a sealing surface, yet while permitting said suspension after extrusion to rapidly regel to retain its extruded shape and to be essentially non-flowable, non-settling and non-sagging under the influence of gravity, the gelling agent being one which does not adversely affect the sealing process or the mechanical integrity of the final seal.
Claim 14
Independent Claim
157 words
A method for extending the useful life of a solder glass suspension, the solder glass suspension comprising a fritted solder glass in an organic vehicle and the organic vehicle consisting essentially of a cellulose binder and an organic solvent for the binder, which comprises the step of: adding a gelling agent to the suspension to impart a reversibly gelled structure thereto, the gelling agent being added in a proportion at least sufficient to render the suspension essentially non-settling and non-sagging under the influence of gravity, while permitting said suspension after it is sheared by remixing or dispensing to become relatively flowable and readily extrudable onto a sealing surface, yet while permitting said suspension after extrusion to rapidly regel to retain its extruded shape and to be essentially non-flowable, non-settling and non-sagging under the influence of gravity, the gelling agent being one which does not adversely affect the sealing process or the mechanical integrity of the final seal.
Claim 15
Dependent Claim
30 words
A method in accordance with claim 12 wherein the gelling agent is an inorganic agent selected from the group consisting of colloidal silica, bentonite clay, kaolinite clay, and attapulgus clay.
Claim 16
Dependent Claim
28 words
A method in accordance with claim 12 wherein the gelling agent is an organic agent selected from the group consisting of acetic acid, lecithin, and the flocculating surfactants.
Claim 17
Dependent Claim
27 words
A method in accordance with claim 14 wherein the flocculating surfactant is selected from the group consisting of fluorocarbon surfactants, lauryl sulfate surfactants, and surface-active organic titanates.
Claim 18
Dependent Claim
13 words
A method in accordance with claim 12 wherein the cellulose binder is nitrocellulose.
Claim 19
Dependent Claim
91 words
A method in accordance with claim 16 wherein the gelling agent is a titanate coupling agent of the formula: (RO).sub.x -Ti-[OX-(R.sup.2).sub.1-2 ].sub.4-x wherein RO is a coupling group consisting of an oxyacetate group or an alkoxy or aryloxy group of from 2-10 carbon atoms, Ti is tetravalent titanium, x is 1 or 2, corresponding to the number of titanium bonding sites occupied by RO coupling groups, OX is a carboxy, phosphato or pyrophosphato binding group, and R 2 is an aliphatic or aromatic hydrocarbon backbone group of from 6-20 carbon atoms.
Claim 20
Dependent Claim
19 words
A method in accordance with claim 17 wherein the gelling agent is titanium di(dioctylpyrophosphate) oxyacetate of the formula: ##STR9##
Claim 21
Dependent Claim
19 words
A method in accordance with claim 17 wherein the gelling agent is isopropyl tri(dioctylpyrophosphato) titanate of the formula: ##STR10##
Claim 22
Dependent Claim
19 words
A method in accordance with claim 17 wherein the gelling agent is isopropyl tri(dioctylphosphato) titanate of the formula: ##STR11##
Claim 23
Dependent Claim
19 words
A method in accordance with claim 17 wherein the gelling agent is isopropyl triisostearyol titanate of the formula: ##STR12##
Claim 24
Dependent Claim
14 words
A method in accordance with claim 13 wherein the gelling agent is colloidal silica.
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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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |