US2932609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroforming millimeter wave components
Assignee: AT&T Inc
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Filing: 1958-07-21
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Granted: 1960-04-12
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Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 Norman J Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:31
CPC Classifications
C; C25; C25D; C25D1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
140 words
AN ELECTROFORMING METHOD COMPRISING WETTING THE SURFACE OF A NON-DUCTING MANDREL WITH A FIRST SUSPENSION CONSISTING ESSENTIALLY OF GRAPHITE IN A VOLATILE MEDIUM EVAPORATING THE VOLATILE MEDIUM CONTAINED IN SAID FIRST SUSPENSION SO AS TO DEPOSIT A LAYER OF GRAPHITE ON SAID SURFACE, WETTING SAID SURFACE WITH A SECOND SUSPENSION CONSISTING ESSENTIALLY OF GRAPHITE AND AN ELEMENTAL METAL SELECTED FROM THE GROUP CONSISTING OF IRON, ZINC AND CADMIUM, IN A VOLATILE MEDIUM, EVAPORATING THE VOLATILE MEDIUM CONTAINED IN SAID SECOND SUSPENSION SO AS TO DEPOSIT A LAYER OF GRAPHITE AND METAL ON SAID SURFACE, IMMERSING SAID MANDREL IN A COPPER SALT SOLUTION SO AS TO DEPOSIT A LAYER OF METALLIC COPPER ON SAID MANDREL BY THE CHEMICAL REPLACEMENT OF SAID METAL AND UTILIZING SAID METALLIZED COPPER LAYER AS A CATHODE FOR THE ELECTROLYTIC DEPOSITION OF A LAYER OF METAL THEREON.
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) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |