Patent US2993271A successfully refreshed from Google Patents.
US2993271A
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Method of producing copper coated metal sheet stock
Assignee: Northrop Grumman Systems Corp
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Filing: 1957-01-22
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Granted: 1961-07-25
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Expires: 1977-01-22
Abstract
No abstract record available.
Inventors
- 👤 Paul W Crapuchettes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:32
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/165; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12833; Y10T428/12861; Y10T428/12903; Y10T428/1291
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS OF PREPARING A COPPER COATED METAL SHEET STOCK FROM A METAL HAVING A RELATIVELY LOW COEFFICIENT OF THERMAL EXPANSION SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN, WHICH COMPRISES, FLASHING THE STOCK WITH NICKEL IN A C1- AND F- SOLUTION AT A LOW PH, PLATING THE FLASHED STOCK WITH NICKEL TO A THICKNESS OF SUBSTANTIALLY .0002 INCH, HEATING SAID NICKEL PLATED STOCK TO A TEMPERATURE OF APPROXIMATELY 1350*C. FOR A PERIOD JUST SUFFICIENT TO COMPLETELY FLOW THE NICKEL AND THEREAFTER FORMING A CONTINUOUS CONDUCTIVE BOND BETWEEN A COPPER COATING AND THE NICKEL SURFACE OVER SUBSTANTIALLY THE WHOLE SURFACE.
Claim 2
Dependent Claim
101 words
A PROCESS OF PREPARING A COPPER COATED METAL SHEET STOCK FROM A METAL HAVING A RELATIVELY LOW COEFFICIENT OF THERMAL EXPANSION SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN, WHICH COMPRISES, FLASHING THE STOCK WITH NICKEL IN A C1- AND F- SOLUTION AT A LOW PH, PLATING THE FLASHED STOCK WITH NICKEL TO A THICKNESS OF SUBSTANTIALLY .0002 INCH, HEATING SAID NICKEL PLATED STOCK TO A TEMPERATURE OF APPROXIMATELY 1350*C. FOR A PERIOD JUST SUFFICIENT TO COMPLETELY FLOW THE NICKEL AND THEREAFTER FORMING A CONTINUOUS CONDUCTIVE BOND BETWEEN A COPPER COATING AND THE NICKEL SURFACE OVER SUBSTANTIALLY THE WHOLE SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |