US3029158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes of chemical nickel plating of amphoteric and like materials
Assignee: General American Transportation Corp
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Filing: 1960-12-06
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Granted: 1962-04-10
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Expires: 1980-12-06
Abstract
No abstract record available.
Inventors
- 👤 Gary Warren G Lee
- 👤 Rudolph E Milito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:13
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34; C23C18/36; C23C18/1601; C23C18/1633; C23C18/1689; C23C18/1692; C23C18/18; C23C18/1803; C23C18/1824; C23C18/1837; C23C18/1844
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE PROCESS OF PLATING WITH NICKEL THE SURFACE OF A METAL WORKPIECE, WHEREIN SAID METAL IS CHARACTERIZED BY THE RAPID FORMATION OF A PASSIVE FILM UPON THE SURFACE THEREOF UPON CONTACT WITH AIR AND WATER; SAID PROCESS COMPRISING CLEANING SAID METAL SURFACE WITH A SUITABLE CLEANING BATH, THEN CONDITIONING SAID METAL SURFACE BY CONTACT WITH A PICKLING BATHM WHEREIN SAID PICKLING BATH ESSENTIALLY COMPRISES AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID IN THE RANGE 2.20 TO 3.30 MOLES/LITER AND SULFURIC ACID IN THE RANGE 3.75 TO 5.65 MOLES/LITER AND CUPRIC ON IN THE RANGE 0.4 TO 0.6 GM./LITER, THEN CONTACTING SAID METAL SURFACE WITH A CHEMICAL PLATING BATH OF THE NICKEL CATION-HYPOPHOSPHITE ANION TYPE THROUGHOUT A SUFFICIENT TIME INTERVAL TO OBTAIN A NICKEL PLATING UPON SAID METAL SURFACE, AND THEN HEATING SAID WORKPIECE TO AN ELEVATED TEMPERATURE THROUGHOUT A TIME INTERVAL SO AS TO EFFECT A DIFFUSION REACTION AT THE INTERFACE BETWEEN SAID NICKEL PLATING AND SAID METAL SURFACE.
Claim 2
Dependent Claim
158 words
THE PROCESS OF PLATING WITH NICKEL THE SURFACE OF A METAL WORKPIECE, WHEREIN SAID METAL IS CHARACTERIZED BY THE RAPID FORMATION OF A PASSIVE FILM UPON THE SURFACE THEREOF UPON CONTACT WITH AIR AND WATER; SAID PROCESS COMPRISING CLEANING SAID METAL SURFACE WITH A SUITABLE CLEANING BATH, THEN CONDITIONING SAID METAL SURFACE BY CONTACT WITH A PICKLING BATHM WHEREIN SAID PICKLING BATH ESSENTIALLY COMPRISES AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID IN THE RANGE 2.20 TO 3.30 MOLES/LITER AND SULFURIC ACID IN THE RANGE 3.75 TO 5.65 MOLES/LITER AND CUPRIC ON IN THE RANGE 0.4 TO 0.6 GM./LITER, THEN CONTACTING SAID METAL SURFACE WITH A CHEMICAL PLATING BATH OF THE NICKEL CATION-HYPOPHOSPHITE ANION TYPE THROUGHOUT A SUFFICIENT TIME INTERVAL TO OBTAIN A NICKEL PLATING UPON SAID METAL SURFACE, AND THEN HEATING SAID WORKPIECE TO AN ELEVATED TEMPERATURE THROUGHOUT A TIME INTERVAL SO AS TO EFFECT A DIFFUSION REACTION AT THE INTERFACE BETWEEN SAID NICKEL PLATING AND SAID METAL SURFACE.
References Cited (Backward Citations)
US2928757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |