US2528902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bright nickel plating
Assignee: Harshaw Chemical Co
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Filing: 1947-06-12
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Granted: 1950-11-07
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Expires: 1967-06-12
Abstract
No abstract record available.
Inventors
- 👤 Paul W Moy
- 👤 Walter P Karash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:27
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/14; C25D3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
AN AQUEOUS, ACID ELECTROPLATING BATH FOR PRODUCTION OF A BRIGHT CATHODIC DEPOSIT OF NICKEL. SAID BATH ESSENTIALLY CONSISTING OF A NICKEL ION YIELDING MATERIAL SULFATE, NICKEL CHLORIDE AND MIXTURES THEREOF, A BUFFER AND, AS AN ADDITION AGENT, A MATERIAL OF THE CLASS CONSISTING OF THIOPHANE SULFONIC ACID AND ITS ALKALI METAL, NICKEL AND COBALT DERIVATIVES WHEREIN THE METAL ATOM REPLACES THE HYDROGEN ATOM OF THE SO3H GROUP. SAID ADDITION AGENT BEING PRESENT IN CONCENTRAFROM 0.005 TO 0.5 GRAM PER LITER, THE PH OF SAID SOLUTION BEING FROM 3.0 TO 5.0.
Claim 2
Dependent Claim
90 words
AN AQUEOUS, ACID ELECTROPLATING BATH FOR PRODUCTION OF A BRIGHT CATHODIC DEPOSIT OF NICKEL. SAID BATH ESSENTIALLY CONSISTING OF A NICKEL ION YIELDING MATERIAL SULFATE, NICKEL CHLORIDE AND MIXTURES THEREOF, A BUFFER AND, AS AN ADDITION AGENT, A MATERIAL OF THE CLASS CONSISTING OF THIOPHANE SULFONIC ACID AND ITS ALKALI METAL, NICKEL AND COBALT DERIVATIVES WHEREIN THE METAL ATOM REPLACES THE HYDROGEN ATOM OF THE SO3H GROUP. SAID ADDITION AGENT BEING PRESENT IN CONCENTRAFROM 0.005 TO 0.5 GRAM PER LITER, THE PH OF SAID SOLUTION BEING FROM 3.0 TO 5.0.
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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |