US3850668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnation of graphite with ruthenium compounds
Assignee: Johnson Matthey PLC
•
Filing: 1972-06-05
•
Granted: 1974-11-26
•
Expires: 1992-06-05
Abstract
Abstract The invention described in this specification concerns the impregnation and/or coating of a body of graphite or carbon with ruthenium metal or a ruthenium compound or both. The method comprises removing gaseous fluid from the carbon or graphite body, contacting the body with a solution or suspension of the ruthenium metal or ruthenium compound and evaporating or allowing to evaporate the solvent or suspending medium so as to leave the ruthenium metal or ruthenium compound in contact with the body. To assist evaporation of the solvent or suspending medium the body may be heated.
Inventors
- 👤 J Heffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:52
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
A METHOD OF TREATING A POROUS BODY OF CARBON OR GRAPHITE WITH RUTHENIUM COMPRISING REMOVING GASEOUS FLUID FROM THE BODY CONTACTING THE BODY WITH A SOLUTION OF RUTHENIUM ACETYLACETONATE, EVAPORATING THE SOLVENT SO AS TO LEAVE THE RUTHENIUM COMPOUND IN CONTACT WITH THE BODY, AND HEATING THE BODY SO AS TO CAUSE THE RUTHENIUM ACETYLACETONATE WITHIN THE PORES OF THE BODY TO DECOMPOSE.
Claim 2
Independent Claim
63 words
A METHOD OF TREATING A POROUS BODY OF CARBON OR GRAPHITE WITH RUTHENIUM COMPRISING REMOVING GASEOUS FLUID FROM THE BODY CONTACTING THE BODY WITH A SOLUTION OF RUTHENIUM ACETYLACETONATE, EVAPORATING THE SOLVENT SO AS TO LEAVE THE RUTHENIUM COMPOUND IN CONTACT WITH THE BODY, AND HEATING THE BODY SO AS TO CAUSE THE RUTHENIUM ACETYLACETONATE WITHIN THE PORES OF THE BODY TO DECOMPOSE.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein the body is heated to assist evaporation of the solvent.
Claim 4
Independent Claim
97 words
A method of treating a porous body of carbon or graphite with ruthenium comprising evacuating gaseous fluid from a chamber in which the body is located and thereby evacuating the pores of the body, flooding the chamber with a solution of ruthenium acetylacetonate and introducing the solution into the pores of the body by breaking the vacuum within the chamber in contact with the solution and thereby causing the liquid to be drawn into the chamber, removing the body from the liquid and heating the body so as to evaporate the solvent and decompose the ruthenium acetylacetonate.
Claim 5
Independent Claim
97 words
A method of treating a porous body of carbon or graphite with ruthenium comprising evacuating gaseous fluid from a chamber in which the body is located and thereby evacuating the pores of the body, flooding the chamber with a solution of ruthenium acetylacetonate and introducing the solution into the pores of the body by breaking the vacuum within the chamber in contact with the solution and thereby causing the liquid to be drawn into the chamber, removing the body from the liquid and heating the body so as to evaporate the solvent and decompose the ruthenium acetylacetonate.
Claim 6
Dependent Claim
18 words
A carbon or graphite body when impregnated with ruthenium in accordaNce with the method claimed in claim 1.
Claim 7
Independent Claim
94 words
A method of producing a substantially uniform deposit of ruthenium within the pores of a porous body of carbon or graphite consisting essentially of removing gaseous fluid from the pores of said body located in a chamber under vacuum, flooding said chamber with a solution of ruthenium acetyl acetonate in a solvent therefor, breaking said vacuum whereby said solution enters the pores of said body, removing said body from said chamber, evaporating said solvent and prior to, simultaneously with or subsequent to evaporating said solvent, heating said body to decompose said ruthenium acetyl acetonate.
Claim 8
Independent Claim
94 words
A method of producing a substantially uniform deposit of ruthenium within the pores of a porous body of carbon or graphite consisting essentially of removing gaseous fluid from the pores of said body located in a chamber under vacuum, flooding said chamber with a solution of ruthenium acetyl acetonate in a solvent therefor, breaking said vacuum whereby said solution enters the pores of said body, removing said body from said chamber, evaporating said solvent and prior to, simultaneously with or subsequent to evaporating said solvent, heating said body to decompose said ruthenium acetyl acetonate.
References Cited (Backward Citations)
US3126296A
Cited
GB936912A
Cited
US3265526A
Cited
US3329527A
Cited
GB1114595A
Cited
US3428544A
Cited
US3567618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |