US4529857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic-glass-ceramic seal by microwave heating
Assignee: United States, DOE THE, Secretary of
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Filing: 1983-10-04
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Granted: 1985-07-16
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Expires: 2003-10-04
Abstract
Abstract A method for producing a ceramic-glass-ceramic seal by microwaving, mixes a slurry of glass sealing material and coupling agent and applies same to ceramic workpieces. The slurry and workpieces are placed together, insulated and then microwaved at a power, time and frequency sufficient to cause a liquid phase reaction in the slurry. The reaction of the glass sealing material forms a chemically different seal than that which would be formed by conventional heating because it is formed by a diffusion rather than by wetting of the reactants.
Inventors
- 👤 Thomas T. Meek
- 👤 Rodger D. Blake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:32
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/003; C04B37/005; H; H05; H05B; H05B6/00; H05B6/64; C04B2235/00; C04B2235/65; C04B2235/66; C04B2235/667; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A method of producing a ceramic-glass-ceramic seal comprising the steps of: mixing a slurry of glass sealing material and coupling agent, applying said slurry to a plurality of ceramic workpieces for sealing, surrounding said slurry and plurality of ceramic workpieces with an insulative material, microwaving said slurry and plurality of ceramic workpieces at a power, time and frequency sufficient to cause a liquid phase reaction in said slurry, and allowing said slurry and plurality of ceramic workpieces to cool, thereby securing a ceramic-glass-ceramic seal.
Claim 2
Independent Claim
84 words
A method of producing a ceramic-glass-ceramic seal comprising the steps of: mixing a slurry of glass sealing material and coupling agent, applying said slurry to a plurality of ceramic workpieces for sealing, surrounding said slurry and plurality of ceramic workpieces with an insulative material, microwaving said slurry and plurality of ceramic workpieces at a power, time and frequency sufficient to cause a liquid phase reaction in said slurry, and allowing said slurry and plurality of ceramic workpieces to cool, thereby securing a ceramic-glass-ceramic seal.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said step of mixing comprises mixing a slurry of glass sealing material and organic coupling agent.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein said step of mixing comprises mixing a slurry of glass sealing material and water.
Claim 5
Dependent Claim
20 words
The method of claim 2 wherein said step of mixing comprises mixing a slurry of glass sealing material and oil.
Claim 6
Dependent Claim
21 words
The method of claim 4 wherein said step of mixing comprises mixing a slurry of glass sealing material and watch oil.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein said step of microwaving comprising microwaving at a frequency of about 2.5 g Hz.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |