US3736649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ceramic-to-metal seal
Assignee: General Electric Co
•
Filing: 1972-08-02
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Granted: 1973-06-05
•
Expires: 1992-08-02
Abstract
Abstract A ceramic-to-metal seal is described which comprises a silvermanganese-copper alloy. Metal may be sealed to ceramic in a one step process without prior metallizing of the ceramic. The alloy melts at temperatures which are sufficiently below the melting point of silver to enable one to seal silver-plated metal parts to ceramic without melting the silver plating.
Inventors
- 👤 R Bristow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:45
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/40; C04B2237/405; C04B2237/50; C04B2237/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
The method of claim 1 where said alloy forming metals comprise shims which are placed between the surfaces of said ceramic and said metal to be sealed together.
Claim 2
Dependent Claim
16 words
The method of claim 2 wherein said shims comprise a silver-manganese washer and a copper washer.
References Cited (Backward Citations)
US2084928A
Cited
US2138638A
Cited
US2729558A
Cited
US2728425A
Cited
US3226822A
Cited
US3197290A
Cited
US3693246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |