US2847372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrolytically coating a metallic object with platinum
Assignee: US Philips Corp
•
Filing: 1956-09-18
•
Granted: 1958-08-12
•
Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Dijksterhuis Popko Reinder
- 👤 Hovingh Albertus Remko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:06
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/50; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S428/9335; Y10S428/934; Y10S428/935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD OF ELECTROLYTICALLY COATING A METALLIC OBJECT WITH PLATINUM COMPRISING THE STEPS, IMMERSING THE METALLIC OBJECT IN AN ELECTROLYTIC BATH COMPRISING AN AQUEOUS SOLUTION OF CHLOROPLATINIC ACID (H2PTCL6) AND MERCURIC CHLORIDE, THE CONCENTRATION OF THE CHLOROPLATINIC ACID BEING FROM ABOUT 150 TO 300 GMS. PER LITER AND THE CONCENTRATION OF THE MERCURIC CHLORIDE BEING ABOUT 1 TO 15 GMS. PER LITER, WHILE PASSING A SUITABLE CURRENT THROUGH THE BATH FOR A TIME SUFFICIENT TO DEPOSIT A LAYER OF PLATINUM BLACK OF THE DESIRED THICKNESS, AND SINTERING SAID LAYER AT A TEMPERATURE OF ABOUT 1000*C. TO CONVERT IT TO PLATINUM SUBSTANTIALLY FREE OF MERCURY.
Claim 2
Independent Claim
104 words
A METHOD OF ELECTROLYTICALLY COATING A METALLIC OBJECT WITH PLATINUM COMPRISING THE STEPS, IMMERSING THE METALLIC OBJECT IN AN ELECTROLYTIC BATH COMPRISING AN AQUEOUS SOLUTION OF CHLOROPLATINIC ACID (H2PTCL6) AND MERCURIC CHLORIDE, THE CONCENTRATION OF THE CHLOROPLATINIC ACID BEING FROM ABOUT 150 TO 300 GMS. PER LITER AND THE CONCENTRATION OF THE MERCURIC CHLORIDE BEING ABOUT 1 TO 15 GMS. PER LITER, WHILE PASSING A SUITABLE CURRENT THROUGH THE BATH FOR A TIME SUFFICIENT TO DEPOSIT A LAYER OF PLATINUM BLACK OF THE DESIRED THICKNESS, AND SINTERING SAID LAYER AT A TEMPERATURE OF ABOUT 1000*C. TO CONVERT IT TO PLATINUM SUBSTANTIALLY FREE OF MERCURY.
References Cited (Backward Citations)
US921943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |