Patent US3198604A successfully refreshed from Google Patents.
US3198604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen generating system
Assignee: Engelhard Industries Inc
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Filing: 1962-05-28
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Granted: 1965-08-03
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Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 William C Pfefferle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:10
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/02; C01B3/04; C01B3/047; H; H01; H01M; H01M8/00; H01M8/06; H01M8/0606; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/041; C01B2203/0465; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE PRODUCTION OF HYDROGEN WHICH COMPRISES CONTACTING GASEOUS AMMONIA WITH A CRACKING CATALYST AT AN ELEVATED TEMPERATURE TO PRODUCE A GASEOUS MIXTURE CONTAINING HYDROGEN AND NITROGEN, CONTACTING SAID GASEOUS MIXTURE WITH ONE SIDE OF A NOBLE METAL DIFFUSION MEMBRANE PERMEABLE TO HYDROGEN TO SEPARATE A DIFFUSED GAS STREAM CONSISTING OF PURE HYDROGEN FROM AN UNDIFFUSED GAS STREAM CONTAINING RESIDUAL UNDIFFUSED HYDROGEN, ADMIXING SAID UNDIFFUSED GAS STREAM WITH OXYGEN CONTAINING GAS TO EFFECT THE COMBUSTION THEREOF AND EMPLOYING THE RESULTANT HEAT OF COMBUSTION TO MAINTAIN THE TEMPERATURE OF SAID CRACKING CATALYST AT SAID ELEVATED TEMPERATURE.
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE PRODUCTION OF HYDROGEN WHICH COMPRISES CONTACTING GASEOUS AMMONIA WITH A CRACKING CATALYST AT AN ELEVATED TEMPERATURE TO PRODUCE A GASEOUS MIXTURE CONTAINING HYDROGEN AND NITROGEN, CONTACTING SAID GASEOUS MIXTURE WITH ONE SIDE OF A NOBLE METAL DIFFUSION MEMBRANE PERMEABLE TO HYDROGEN TO SEPARATE A DIFFUSED GAS STREAM CONSISTING OF PURE HYDROGEN FROM AN UNDIFFUSED GAS STREAM CONTAINING RESIDUAL UNDIFFUSED HYDROGEN, ADMIXING SAID UNDIFFUSED GAS STREAM WITH OXYGEN CONTAINING GAS TO EFFECT THE COMBUSTION THEREOF AND EMPLOYING THE RESULTANT HEAT OF COMBUSTION TO MAINTAIN THE TEMPERATURE OF SAID CRACKING CATALYST AT SAID ELEVATED TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |