Patent US5650202A successfully refreshed from Google Patents.
US5650202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a platinum coating on non-coductive substrates such as glass
Assignee: United States Department of the Army
•
Filing: 1996-07-18
•
Granted: 1997-07-22
•
Expires: 2016-07-18
Abstract
Abstract Methods of forming a platinum deposit on a nonconductive substrate are disclosed, comprising the steps of hydrophobically treating a carbon black powder, forming a solution of chloroplatinic acid, suspending the hydrophobically treated carbon black powder in the chloroplatinic acid, immersing a nonconductive substrate in the chloroplatinic acid and adding formaldehyde to said chloroplatinic acid. The hydrophobically carbon black powder suspended in the chloroplatinic acid catalyzes and drives the reduction of platinum within the chloroplatinic acid toward the nonconductive substrate and reduces the chloroplatinic acid forming metallic platinum on the nonconductive substrate. In a preferred embodiment, a platinum deposit is formed on a glass substrate immersed in the chloroplatinic acid and the step of hydrophobically treating the carbon black powder is accomplished by adding a CF4 gas plasma to the carbon black powder.
Inventors
- 👤 Robert J. Mammone
- 👤 Deryn D. Chu
- 👤 Michael Binder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:07
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/1601; C23C18/1633; C23C18/1655; C23C18/1662; C23C18/1658; C23C18/31; C23C18/42; C23C18/44
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
A method of forming a platinum deposit on a nonconductive substrate, comprising the steps of: hydrophobically treating a carbon black powder; forming chloroplatinic acid; suspending said hydrophobically treated carbon black powder in said chloroplatinic acid; immersing said nonconductive substrate in said chloroplatinic acid; adding formaldehyde to said chloroplatinic acid; said hydrophobically treated carbon black powder catalyzing and driving the reduction of platinum within said chloroplatinic acid toward said nonconductive substrate; and reducing said chloroplatinic acid to form metallic platinum on said nonconductive substrate.
Claim 2
Independent Claim
83 words
A method of forming a platinum deposit on a nonconductive substrate, comprising the steps of: hydrophobically treating a carbon black powder; forming chloroplatinic acid; suspending said hydrophobically treated carbon black powder in said chloroplatinic acid; immersing said nonconductive substrate in said chloroplatinic acid; adding formaldehyde to said chloroplatinic acid; said hydrophobically treated carbon black powder catalyzing and driving the reduction of platinum within said chloroplatinic acid toward said nonconductive substrate; and reducing said chloroplatinic acid to form metallic platinum on said nonconductive substrate.
Claim 3
Dependent Claim
33 words
The method of forming a platinum deposit on a nonconductive substrate, as recited in claim 1, wherein said hydrophobic treatment step comprises treating said carbon black powder with a CF 4 gas plasma.
Claim 4
Dependent Claim
26 words
The method of forming a platinum deposit on a nonconductive substrate, as recited in claim 2, wherein said nonconductive substrate includes at least one wettable surface.
Claim 5
Dependent Claim
24 words
The method of forming a platinum deposit on a nonconductive substrate, as recited in claim 3, wherein said nonconductive substrate is a glass substrate.
Claim 6
Dependent Claim
24 words
The method of forming a platinum deposit on a nonconductive substrate, as recited in claim 4, wherein said glass substrate is a glass slide.
Claim 7
Dependent Claim
24 words
The method of forming a platinum deposit on a nonconductive substrate, as recited in claim 3, wherein said nonconductive substrate is a silicon wafer.
Claim 8
Dependent Claim
32 words
The method of forming a platinum deposit on a nonconductive substrate, as recited in claim 1, wherein said hydrophobic treatment step comprises treating said carbon black powder with an ether gas plasma.
Claim 9
Independent Claim
88 words
A method of forming a platinum deposit on a glass substrate, comprising the steps of: hydrophobically treating a carbon black powder with a CF 4 gas plasma; forming chloroplatinic acid; suspending said hydrophobically treated carbon black powder in said chloroplatinic acid; immersing said glass substrate in said chloroplatinic acid; adding formaldehyde to said chloroplatinic acid; said hydrophobically carbon black powder catalyzing and driving the reduction of platinum within said chloroplatinic acid toward said glass substrate; and reducing said chloroplatinic acid to form metallic platinum on said glass substrate.
Claim 10
Independent Claim
88 words
A method of forming a platinum deposit on a glass substrate, comprising the steps of: hydrophobically treating a carbon black powder with a CF 4 gas plasma; forming chloroplatinic acid; suspending said hydrophobically treated carbon black powder in said chloroplatinic acid; immersing said glass substrate in said chloroplatinic acid; adding formaldehyde to said chloroplatinic acid; said hydrophobically carbon black powder catalyzing and driving the reduction of platinum within said chloroplatinic acid toward said glass substrate; and reducing said chloroplatinic acid to form metallic platinum on said glass substrate.
Claim 11
Dependent Claim
24 words
The method of forming a platinum deposit on a glass substrate, as recited in claim 8, wherein said glass substrate is a glass slide.
Claim 12
Dependent Claim
32 words
The method of forming a platinum deposit on a glass substrate, as recited in claim 8, wherein said hydrophobic treatment step comprises treating said carbon black powder with an ether gas plasma.
References Cited (Backward Citations)
US4379772A
Cited
US4440617A
Cited
US4518705A
Cited
US4379034A
Cited
US5328782A
Cited
US5500201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-07-21 | 2001-01-20 | 2001-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-21 | 2005-01-20 | 2005-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-21 | 2009-01-20 | 2009-07-22 | $7700.00 | Window Closed / Lapsed |