US2706170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroforming low stress nickel
Assignee: Unisys Corp
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Filing: 1951-11-15
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Granted: 1955-04-12
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Expires: 1971-11-15
Abstract
No abstract record available.
Inventors
- 👤 Vincent J Marchese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:02
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/18; C25D1/00; Y; Y10; Y10S; Y10S204/00; Y10S204/08; Y10S204/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF PRODUCING ELECTROFORMED NICKEL ARTICLES WHICH COMPRISES IMMERSING AS A CATHODE A MANDREL OF THE ARTICLE TO BE FORMED AND A NICKEL ANODE IN A WATTS PLATING BATH WITH A PH VALUE OF SUBSTANTIALLY 4.5, SUBJECTING THE BATH TO A DIRECT PLATING CURRENT OF BETWEEN 10 AND 50 AMPERES PER SQUARE FOOT AND D.-C. VOLTAGE HAVING A SUPERIMPOSED A.-C. VOLTAGE OF A PEAK MAGNITUDE OF SUBSTANTIALLY THREE TIMES THAT OF THE D.-C. PLATING VOLTAGE TO ELECTRODEPOSIT NICKEL HAVING MINIMIZED INTERNAL STRESS UPON THE MANDREL, WITHDRAWING THE ELECTROFORMED NICKEL ARTICLE AND MANDREL FROM THE BATH, AND REMOVING THE ELECTROFORMED NICKEL ARTICLE FROM THE MANDREL.
Claim 2
Independent Claim
105 words
A METHOD OF PRODUCING ELECTROFORMED NICKEL ARTICLES WHICH COMPRISES IMMERSING AS A CATHODE A MANDREL OF THE ARTICLE TO BE FORMED AND A NICKEL ANODE IN A WATTS PLATING BATH WITH A PH VALUE OF SUBSTANTIALLY 4.5, SUBJECTING THE BATH TO A DIRECT PLATING CURRENT OF BETWEEN 10 AND 50 AMPERES PER SQUARE FOOT AND D.-C. VOLTAGE HAVING A SUPERIMPOSED A.-C. VOLTAGE OF A PEAK MAGNITUDE OF SUBSTANTIALLY THREE TIMES THAT OF THE D.-C. PLATING VOLTAGE TO ELECTRODEPOSIT NICKEL HAVING MINIMIZED INTERNAL STRESS UPON THE MANDREL, WITHDRAWING THE ELECTROFORMED NICKEL ARTICLE AND MANDREL FROM THE BATH, AND REMOVING THE ELECTROFORMED NICKEL ARTICLE FROM THE MANDREL.
References Cited (Backward Citations)
US2515192A
Cited
US2619454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |