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US4424090A Expired / Lapsed US ⏱️ 0.0 years remaining

Insulating material and method of making material

Assignee: PACIFIC COAST TECHNOLOGIES Inc A WA CORP
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Filing: 1982-09-29
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Granted: 1984-01-03
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Expires: 2002-09-29
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Abstract

Abstract A material is provided for producing a hermetic seal with a member made from one of the following: titanium, titanium alloys, platinum, chromel, Alumel, stainless steels and Inconel. The material is particularly adapted to be used with titanium, titanium alloys, Inconel and the 300 series of stainless steels since it has at different temperatures a coefficient of thermal expansion matching changes in the coefficient of thermal expansion of titanium, titanium alloys, Inconel and the 300 series of stainless steels throughout a range of temperatures to approximately 1500° F. The material is partially polycrystalline and partially amorphous and is provided with a high electrical insulation and is impervious to acids and thermal and mechanical shocks. The material may have the following composition: ______________________________________ Oxide Range of Percentages by Weight ______________________________________ Lead oxide (red lead) 57-68 Silicon dioxide 28-32 Soda ash (sodium carbonate) 0.4-0.6 Titanium dioxide 3.2-3.9 Zirconium oxide 3.0-3.7 Boric acid 2.2-2.6 ______________________________________

Inventors

  • 👤 James C. Kyle

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 20:27
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/24; C03C8/245; C03C27/00; C03C27/02

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 76 words
A method of forming an electrical material, including the following steps: mixing the following oxides ______________________________________ Oxide Range of Percentages by Weight ______________________________________ Lead oxide (red lead) 57-68 Silicon dioxide 23-32 Soda ash (sodium carbonate) 0.4-0.6 Titanium dioxide 3.2-3.9 Zirconium oxide 3.0-3.7 Boric acid 2.2-2.6 ______________________________________ heating the mixture to a suitable temperature to approximately 1700° F. for a particular period of time, quenching the heated mixture in water, and forming the quenched mixture into beads.
Claim 2
Independent Claim 76 words
A method of forming an electrical material, including the following steps: mixing the following oxides ______________________________________ Oxide Range of Percentages by Weight ______________________________________ Lead oxide (red lead) 57-68 Silicon dioxide 23-32 Soda ash (sodium carbonate) 0.4-0.6 Titanium dioxide 3.2-3.9 Zirconium oxide 3.0-3.7 Boric acid 2.2-2.6 ______________________________________ heating the mixture to a suitable temperature to approximately 1700° F. for a particular period of time, quenching the heated mixture in water, and forming the quenched mixture into beads.
Claim 3
Dependent Claim 58 words
The method set forth in claim 1, including the following additional steps: applying the beads to a member made from titanium, Inconel or stainless steel in the 300 series, and heating the beads and the member to a temperature of 1200° F. to 1600° F. for a particular period of time to seal the mixture to the member.
Claim 4
Dependent Claim 59 words
The method set forth in claim 1 wherein the mixture has the following composition: ______________________________________ Oxide Percentage by Weight ______________________________________ Lead oxide (red lead) 64.9 Silicon dioxide 25.3 Soda ash (sodium carbonate) 0.5 Titanium dioxide 3.5 Zirconium oxide 3.3 Boric acid 2.4 ______________________________________ and the mixture is heated for a particular period of time to approximately three (3) hours.
Claim 5
Dependent Claim 59 words
The method set forth in claim 1, including the following additional steps: applying the beads to a member made from one of the following materials: titanium, titanium alloys, stainless steels, platinum, Chromel, Alumel and Inconel, and heating the beads and the member to a temperature of approximately 1200° F. to 1600° F. to seal the mixture to the member.
Claim 6
Dependent Claim 50 words
The method set forth in claim 4 wherein the mixture has the following composition: ______________________________________ Oxide Percentage by Weight ______________________________________ Lead oxide (red lead) 64.9 Silicon dioxide 25.3 Soda ash (sodium carbonate) 0.5 Titanium dioxide 3.5 Zirconium oxide 3.3 Boric acid 2.4 ______________________________________ and the member is made from titanium.
Claim 7
Dependent Claim 51 words
The method set forth in claim 1, including the following additional steps: applying the beads to a member made from stainless steel or Inconel, and heating the beads and the member to a temperature of approximately 1600° F. for a particular period of time to seal the mixture to the member.
Claim 8
Dependent Claim 43 words
The method set forth in claim 6 wherein the mixture has the following composition: ______________________________________ Oxide Percentage by Weight ______________________________________ Lead oxide (red lead) 61.4 Silicon dioxide 27.9 Soda ash (sodium carbonate) 0.5 Titanium dioxide 3.9 Zirconium oxide 3.7 Boric acid 2.6 ______________________________________

References Cited (Backward Citations)

US2949376A Cited
US3410674A Cited
US4029897A Cited
US3957496A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-01-02 1987-07-04 1988-01-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-01-02 1991-07-04 1992-01-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-01-02 1995-07-04 1996-01-03 $7700.00 Window Closed / Lapsed

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