US3212937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a fuel cell electrode
Assignee: Air Products and Chemicals Inc
•
Filing: 1961-07-25
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Granted: 1965-10-19
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Expires: 1981-07-25
Abstract
No abstract record available.
Inventors
- 👤 Talvenheimo Gerhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:26
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THE METHOD OF MAKING A POROUS MATRIX FUEL CELL ELECTRODE WHICH COMPRISES THE STEPS OF: (A) FORMING A RAW MIX OF PULVERIZED CARBONACEOUS MATERIAL COMPRISING HIGH SURFACE, AREA, ACTIVATED CARBON POWDER AND A HEAVY RESIDUAL HYDROCARBON OIL AND CONSTITUTING ABOUT 80-160 WT. PERCENT OF THE PULVERIZED CARBONACEOUS MATERIAL, (B) COMPRESSING SAID RAW MIX TO THE DESIRED MATRIX SHAPE BY APPLIED PRESSURE OF ABOUT 1500-2500 P.S.I.G., (C) BAKING SAID RAW MIX IN A REDUCING, HYDROCARBON ATMOSPHERE AT A TEMPERATURE IN THE RANGE OF ABOUT 150-250*C. FOR A PERIOD OF ABOUT 2-3 DAYS, (D) FINAL BAKING SAID BAKED MIX BY GRADUAL PERIODIC INCREASES IN TEMPERATURE UNTIL AN ELEVATED TEMPERATURE OF ABOUT 1000*C. IS ATTAINED, (E) HOLDING SAID ELEVATED TEMPERATURE SUBSTANTIALLY CONSTANT FOR A PERIOD OF AT LEAST ONE HOUR, (F) AND PERMITTING SAID FINAL BAKED MIX TO COOL AT AMBIENT TEMPERATURE.
Claim 2
Independent Claim
139 words
THE METHOD OF MAKING A POROUS MATRIX FUEL CELL ELECTRODE WHICH COMPRISES THE STEPS OF: (A) FORMING A RAW MIX OF PULVERIZED CARBONACEOUS MATERIAL COMPRISING HIGH SURFACE, AREA, ACTIVATED CARBON POWDER AND A HEAVY RESIDUAL HYDROCARBON OIL AND CONSTITUTING ABOUT 80-160 WT. PERCENT OF THE PULVERIZED CARBONACEOUS MATERIAL, (B) COMPRESSING SAID RAW MIX TO THE DESIRED MATRIX SHAPE BY APPLIED PRESSURE OF ABOUT 1500-2500 P.S.I.G., (C) BAKING SAID RAW MIX IN A REDUCING, HYDROCARBON ATMOSPHERE AT A TEMPERATURE IN THE RANGE OF ABOUT 150-250*C. FOR A PERIOD OF ABOUT 2-3 DAYS, (D) FINAL BAKING SAID BAKED MIX BY GRADUAL PERIODIC INCREASES IN TEMPERATURE UNTIL AN ELEVATED TEMPERATURE OF ABOUT 1000*C. IS ATTAINED, (E) HOLDING SAID ELEVATED TEMPERATURE SUBSTANTIALLY CONSTANT FOR A PERIOD OF AT LEAST ONE HOUR, (F) AND PERMITTING SAID FINAL BAKED MIX TO COOL AT AMBIENT TEMPERATURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |