US3877994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic paste and electrode
Assignee: Westinghouse Electric Corp
•
Filing: 1972-10-25
•
Granted: 1975-04-15
•
Expires: 1992-10-25
Abstract
Abstract A catalytic paste is disclosed which contains 3 to 55% finelydivided carbon, 2 to 10% binder, 0.4 to 6% catalyst, 30 to 70% water, and 0.01 to 3% water-soluble alkali-resistant thickener which, in a 2% aqueous solution, has a viscosity of at least 100 centipoises. The thickener is preferably a non-ionic cellulosic ether. A conducting plaque is filled with the catalytic paste to form an electrode.
Inventors
- 👤 Jacob Chottiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:51
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
22 words
about 3 to about 55% of a substantially elemental carbon material having an average particle size of less than about 25 microns;
Claim 2
Dependent Claim
22 words
about 3 to about 55% of a substantially elemental carbon material having an average particle size of less than about 25 microns;
Claim 3
Dependent Claim
4 words
A catalytic paste comprising:
Claim 4
Dependent Claim
4 words
A catalytic paste comprising:
Claim 5
Dependent Claim
22 words
about 3 to about 55% of a substantially elemental carbon material having an average particle size of less than about 25 microns;
Claim 6
Dependent Claim
22 words
about 3 to about 55% of a substantially elemental carbon material having an average particle size of less than about 25 microns;
Claim 7
Dependent Claim
9 words
about 2 to about 10% of a hydrophobic binder;
Claim 8
Dependent Claim
9 words
about 2 to about 10% of a hydrophobic binder;
Claim 9
Dependent Claim
9 words
about 2 to about 10% of a hydrophobic binder;
Claim 10
Dependent Claim
9 words
about 2 to about 10% of a hydrophobic binder;
Claim 11
Dependent Claim
14 words
A catalytic paste according to claim 1 wherein said all-carbon material is activated carbon.
Claim 12
Dependent Claim
22 words
A catalytic paste according to claim 2 wherein said activated carbon has a particle size of less than about 0.5 Mu m.
Claim 13
Dependent Claim
8 words
about 0.6 to about 4% of a catalyst;
Claim 14
Dependent Claim
8 words
about 0.6 to about 4% of a catalyst;
Claim 15
Dependent Claim
8 words
about 0.6 to about 4% of a catalyst;
Claim 16
Dependent Claim
8 words
about 0.6 to about 4% of a catalyst;
Claim 17
Dependent Claim
7 words
about 30 to about 70% water; and
Claim 18
Dependent Claim
7 words
about 30 to about 70% water; and
Claim 19
Dependent Claim
7 words
about 30 to about 70% water; and
Claim 20
Dependent Claim
7 words
about 30 to about 70% water; and
Claim 21
Dependent Claim
12 words
A catalytic paste according to claim 1 wherein said binder is polytetrafluoroethylene.
Claim 22
Dependent Claim
30 words
A catalytic paste according to claim 1 wherein said catalyst is soluble mercury and silver salts in a mole ration of about 0.1 to 1 to about 1 to 1.
Claim 23
Dependent Claim
53 words
about 0.01 to about 3% of a non-ionic, water soluble thickener, said thickener being sufficiently resistant to alkali so that it does not form products which poison the electrolyte, and which, in a 2% solution, has a viscosity in excess of 100 centipoises, said thickener producing an improved polarization over a composition therewithout.
Claim 24
Dependent Claim
53 words
about 0.01 to about 3% of a non-ionic, water soluble thickener, said thickener being sufficiently resistant to alkali so that it does not form products which poison the electrolyte, and which, in a 2% solution, has a viscosity in excess of 100 centipoises, said thickener producing an improved polarization over a composition therewithout.
Claim 25
Dependent Claim
53 words
about 0.01 to about 3% of a non-ionic, water-soluble thickener, said thickener being sufficiently resistant to alkali so that it does not form products which poison the electrolyte, and, which, in a 2% aqueous solution, produces a viscosity of at least 100 centipoises, said thickener producing an improved polarization over a composition therewithout.
Claim 26
Dependent Claim
53 words
about 0.01 to about 3% of a non-ionic, water-soluble thickener, said thickener being sufficiently resistant to alkali so that it does not form products which poison the electrolyte, and, which, in a 2% aqueous solution, produces a viscosity of at least 100 centipoises, said thickener producing an improved polarization over a composition therewithout.
Claim 27
Dependent Claim
14 words
A catalytic paste according to claim 1 wherein said thickener is a cellulosic ether.
Claim 28
Dependent Claim
14 words
A catalytic paste according to claim 6, wherein said cellulosic ether is hydroxypropyl cellulose.
Claim 29
Dependent Claim
22 words
A catalytic paste according to claim 1 wherein the amount of said thickener is about 0.05 to about 0.6% of said paste.
Claim 30
Dependent Claim
15 words
A catalytic paste according to claim 1 which includes up to about 40% manganese dioxide.
Claim 31
Dependent Claim
13 words
An electrode comprising a porous conducting plaque filled with a catalytic paste comprising:
Claim 32
Dependent Claim
13 words
An electrode comprising a porous conducting plaque filled with a catalytic paste comprising:
Claim 33
Dependent Claim
11 words
An electrode according to claim 10 wherein said plaque is nickel.
Claim 34
Dependent Claim
22 words
AN ELECTRODE ACCORDING TO CLAIM 11 WHEREIN SAID PLAQUE IS COMPOSED OF ABOUT 2 TO ABOUT 100 LAYERS OF DIFFUSIONBONDED NICKEL FIBERS.
Claim 35
Dependent Claim
52 words
An electrode according to claim 12 wherein said plaque is about 2 to about 50 mils thick, said fibers are about 1/2 to about 5 mils thick, and the fibers in each layer are approximately unidirectional and at an angle of about 30* to 90* to the fibers in an adjacent layer.
Claim 36
Dependent Claim
19 words
An electrode according to claim 10 wherein one side of said plaque is covered with a porous, hydrophobic membrane.
Claim 37
Dependent Claim
25 words
An electrode according to claim 14 wherein said membrane is fibrillated polytetrafluoroethylene reinforced with fibrous polypropylene and is about 5 to about 40 mils thick.
Claim 38
Dependent Claim
18 words
An Electrode according to claim 10 wherein said plaque has a porosity of about 70 to about 90%.
Claim 39
Dependent Claim
13 words
An electrode according to claim 10 wherein said paste is dehydrated and compacted.
Claim 40
Dependent Claim
18 words
An electrode according to claim 10 wherein said all-carbon material is activated carbon and said binder is polytetrafluoroethylene.
Claim 41
Dependent Claim
12 words
An electrode according to claim 10 wherein said thickener is cellulosic ether.
References Cited (Backward Citations)
US1951814A
Cited
US3077507A
Cited
US3348975A
Cited
US3318736A
Cited
US3385736A
Cited
US3553029A
Cited
US3527616A
Cited
US3388004A
Cited
US3600230A
Cited
US3671323A
Cited
US3704171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |