Patent US2928757A successfully refreshed from Google Patents.
US2928757A
Expired / Lapsed
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Process of chemical nickel plating of amphoteric elements and their alloys
Assignee: General American Transportation Corp
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Filing: 1957-11-27
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Granted: 1960-03-15
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Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 Warren G Lee
- 👤 Browar Emilian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:11
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; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
THE PROCESS OF PLATING WITH NICKEL THE METAL SURFACE OF A WORK-PIECE, WHEREIN SAID METAL SURFACE ESSENTIALLY COMPRISES AN AMPHOTERIC ELEMENT SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM AND HAFNIUM, SAID PROCESS COMPRISING CLEANING SAID METAL SURFACE BY CONTACT WITH A SUITABLE CLEANING BATH, THEN CONDITIONING SAID METAL SURFACE BY CONTACT WITH A PICKLING BATH, WHEREIN SAID PICKLING BATH ESSENTIALLY COMPRISES AN AQUEOUS SOLUTION OF HYDROCHLORIC ACID AND HYDROFLUORIC ACID AND A MILD OXIDIZING AGENT, THE ABSOLUTE CONCENTRATION OF HYDROCHLORIC ACID IN SAID PICKLING BATH BEING ABOUT 8 MOLE/LITER, THE ABSOLUTE CONCENTRATION OF HYDROFLUORIC ACID IN SAID PICKLING BATH BEING ABOUT 4 1/2 MOLE/TIER, THEN CONTACTING SAID METAL SURFACE WITH A CHEMECIAL 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 WORK-PIECE TO A TEMPERATURE AT LEAST AS HIGH AS ABOUT 425*C. SO AS TO EFFECT A DIFFUSION REACTION AT THE INTE
Claim 2
Dependent Claim
160 words
THE PROCESS OF PLATING WITH NICKEL THE METAL SURFACE OF A WORK-PIECE, WHEREIN SAID METAL SURFACE ESSENTIALLY COMPRISES AN AMPHOTERIC ELEMENT SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM AND HAFNIUM, SAID PROCESS COMPRISING CLEANING SAID METAL SURFACE BY CONTACT WITH A SUITABLE CLEANING BATH, THEN CONDITIONING SAID METAL SURFACE BY CONTACT WITH A PICKLING BATH, WHEREIN SAID PICKLING BATH ESSENTIALLY COMPRISES AN AQUEOUS SOLUTION OF HYDROCHLORIC ACID AND HYDROFLUORIC ACID AND A MILD OXIDIZING AGENT, THE ABSOLUTE CONCENTRATION OF HYDROCHLORIC ACID IN SAID PICKLING BATH BEING ABOUT 8 MOLE/LITER, THE ABSOLUTE CONCENTRATION OF HYDROFLUORIC ACID IN SAID PICKLING BATH BEING ABOUT 4 1/2 MOLE/TIER, THEN CONTACTING SAID METAL SURFACE WITH A CHEMECIAL 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 WORK-PIECE TO A TEMPERATURE AT LEAST AS HIGH AS ABOUT 425*C. SO AS TO EFFECT A DIFFUSION REACTION AT THE INTE
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |