US3878425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum - tight carbon bodies
Assignee: Siemens AG
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Filing: 1973-08-24
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Granted: 1975-04-15
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Expires: 1993-08-24
Abstract
Abstract A vacuum-tight body composed of at least two carbon members which are joined to one another with a layer of a gas-impermeable solder material selected from the group consisting of Cu, Ag, Au, and alloys thereof in direct contact with a rhenium layer on adjoining carbon surfaces. The body may form a collector which forms part of a vessel wall in a high capacity electric discharge vessel.
Inventors
- 👤 Helmut Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:52
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; H; H01; H01J; H01J23/00; H01J23/02; H01J23/027; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/124; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/363; C04B2237/50; C04B2237/72; C04B2237/76; C04B2237/84
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A GAS-IMPERMEABLE MEMBER COMPRISING A COLLECTOR ELECTRODE WHICH FORMS A HOUSING WALL PORTION IN A HIGH CAPACITY ELECTRIC DISCHARGE VESSEL, SAID MEMBER BEING COMPRISED OF AT LEAST TWO SUBSTANTIALLY PERMANENTLY JOINED BODY MEMBERS COMPOSED OF CARBON AND HAVING ADJACENT CONTACTING SURFACES; A SOLID PROTECTIVE LAYER OF RHENIUM OR EACH OF SAID CONTACTING SURFACES; AND A LAYER OF A METAL SOLDER COMPOSED OF A METAL SELECTED FROM THE GROUP CONSISTING OF CU, AG, AU AND ALLOYS THEREOF ON SAID RHENIUM LAYERS WHEREBY A GAS-IMPERMEABLE SEAL IS DEFINED BETWEEN SAID CARBON BODY MEMBERS.
Claim 2
Dependent Claim
91 words
A GAS-IMPERMEABLE MEMBER COMPRISING A COLLECTOR ELECTRODE WHICH FORMS A HOUSING WALL PORTION IN A HIGH CAPACITY ELECTRIC DISCHARGE VESSEL, SAID MEMBER BEING COMPRISED OF AT LEAST TWO SUBSTANTIALLY PERMANENTLY JOINED BODY MEMBERS COMPOSED OF CARBON AND HAVING ADJACENT CONTACTING SURFACES; A SOLID PROTECTIVE LAYER OF RHENIUM OR EACH OF SAID CONTACTING SURFACES; AND A LAYER OF A METAL SOLDER COMPOSED OF A METAL SELECTED FROM THE GROUP CONSISTING OF CU, AG, AU AND ALLOYS THEREOF ON SAID RHENIUM LAYERS WHEREBY A GAS-IMPERMEABLE SEAL IS DEFINED BETWEEN SAID CARBON BODY MEMBERS.
Claim 3
Dependent Claim
31 words
A gas-impermeable member as defined in claim 1 wherein said solid protective layer of rhenium is positioned on the respective contacting surfaces of the carbon-body member by a reduction deposition process.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |