Patent US2839457A successfully refreshed from Google Patents.
US2839457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating
Assignee: Hanson Van Winkle Munning Co
•
Filing: 1956-11-16
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Granted: 1958-06-17
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Expires: 1976-11-16
Abstract
No abstract record available.
Inventors
- 👤 Foulke Donald Gardner
- 👤 Kardos Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:18
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/14; C25D3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
THE PROCESS FOR PRODUCING BRIGHT NICKEL DEPOSITS WHICH COMPRISES ELECTRODEPOSITING NICKEL FROM AN AQUEOUS ACIDIC SOLUTION OF AT LEAST ONE NICKEL SALT IN WHICH THERE IS DISSOLVED FROM ABOUT 0.01 TO ABOUT 1 GRAM PER LITER OF AN AROMATIC N-OXIDE COMPOUND POSSESSING A POLAR NITROGEN-OXYGEN BOND HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
50 words
THE PROCESS FOR PRODUCING BRIGHT NICKEL DEPOSITS WHICH COMPRISES ELECTRODEPOSITING NICKEL FROM AN AQUEOUS ACIDIC SOLUTION OF AT LEAST ONE NICKEL SALT IN WHICH THERE IS DISSOLVED FROM ABOUT 0.01 TO ABOUT 1 GRAM PER LITER OF AN AROMATIC N-OXIDE COMPOUND POSSESSING A POLAR NITROGEN-OXYGEN BOND HAVING THE STRUCTURAL FORMULA
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |