Patent US3556957A successfully refreshed from Google Patents.
US3556957A
Expired / Lapsed
US
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Metal treatment
Assignee: Honeywell Inc
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Filing: 1966-01-03
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Granted: 1971-01-19
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Expires: 1986-01-03
Abstract
Abstract A WIRE SUBSTRATE, TYPICALLY BERYLLIUM-COPPER, FOR SUBSEQUENT PLATING WITH MAGNETIC FILMS FOR INFORMATION STORAGE IS PREPARED BY ELECTROLYTICALLY ERODING THE WIRE CONTINUOUSLY IN AN ACID BATH TO REMOVE THE OUTER, BIELBY LAYER, AND SUBSEQUENTLY DEPOSITING THEREON METAL, TYPICALLY COPPER, TO REBUILD THE SUBSTRATE TO THE DESIRED THICKNESS. THE REDUCING BATH PREFERABLY INCLUDES A HALOGEN ADDITIVE.
Inventors
- 👤 Emil Toledo
- 👤 Peter P Semienko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:36
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; H; H01; H01F; H01F10/00; H01F10/06; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12729; Y10T428/12771; Y10T428/12861; Y10T428/12903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |