Patent US3907659A successfully refreshed from Google Patents.
US3907659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite electrode and method of making same
Assignee: Bechtel Civil and Minerals Inc
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Filing: 1974-04-04
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Granted: 1975-09-23
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Expires: 1994-04-04
Abstract
Abstract A composite electrode includes two opposing sheets of titanium spaced apart in a central portion and sealed together around their edges to form an envelope. A mass of work-hardened copper wool or shredded copper is disposed in a compressed state within the envelope to provide a core of substantially greater electrical conductivity than that of the titanium sheets, which protect the copper from chemical corrosion.
Inventors
- 👤 Peter M Paige
- 👤 Emil S Scherba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:56
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A COMPOSITE ELECTRODE COMPRISING A PAIR OF OPPOSING SHEETS OF TITANIUM SPACED APART IN A CENTRAL PORTION AND SEALED AROUND THEIR EDGES TO FORM AN ENVELOPE, AND A MASS OF PIECES OF A METAL HAVING A SUBSTANTIALLY GREATER ELECTRICAL CONDUCTIVITY THAN THAT OF TITANIUM DISPOSED IN A COMPRESSED STATE WITHIN THE ENVELOPE.
Claim 2
Dependent Claim
52 words
A COMPOSITE ELECTRODE COMPRISING A PAIR OF OPPOSING SHEETS OF TITANIUM SPACED APART IN A CENTRAL PORTION AND SEALED AROUND THEIR EDGES TO FORM AN ENVELOPE, AND A MASS OF PIECES OF A METAL HAVING A SUBSTANTIALLY GREATER ELECTRICAL CONDUCTIVITY THAN THAT OF TITANIUM DISPOSED IN A COMPRESSED STATE WITHIN THE ENVELOPE.
Claim 3
Dependent Claim
25 words
An electrode according to claim 1 in which the pieces of metal are selected from the group consisting of work-hardened copper wool and shredded copper.
Claim 4
Dependent Claim
20 words
An electrode according to claim 1 which includes a copper core embedded in the mass of the pieces of metal.
Claim 5
Dependent Claim
37 words
An electrode according to claim 1 which includes a copper plate embedded in the mass in the pieces of metal and projecting outwardly from the envelope to provide means for attaching the electrode to a hanger bar.
Claim 6
Dependent Claim
26 words
An electrode according to claim 1 in which the mass of pieces of metal is compressed to a volume substantially less than its normal free density.
Claim 7
Dependent Claim
80 words
A composite electrode comprising a pair of opposing sheets of titanium spaced apart in a central portion and sealed together entirely around their respective peripheries to form a hermetically sealed envelope between the two sheets, a plate of metal having an electrical conductivity substantially greater than that of titanium disposed within the envelope and spaced from the titanium sheets, and pieces of metal of greater electrical conductivity than titanium packed in the space between the plate and the titanium sheets.
Claim 8
Dependent Claim
80 words
A composite electrode comprising a pair of opposing sheets of titanium spaced apart in a central portion and sealed together entirely around their respective peripheries to form a hermetically sealed envelope between the two sheets, a plate of metal having an electrical conductivity substantially greater than that of titanium disposed within the envelope and spaced from the titanium sheets, and pieces of metal of greater electrical conductivity than titanium packed in the space between the plate and the titanium sheets.
References Cited (Backward Citations)
US569722A
Cited
US2104812A
Cited
US2331071A
Cited
US2865832A
Cited
US2867570A
Cited
US3223611A
Cited
US3278410A
Cited
US3761385A
Cited
US3804732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |