Patent US2635948A successfully refreshed from Google Patents.
US2635948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydrogen
Assignee: Eastman Kodak Co
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Filing: 1948-11-06
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Granted: 1953-04-21
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Expires: 1968-11-06
Abstract
No abstract record available.
Inventors
- 👤 Hasche Rudolph Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:56
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/061; C01B3/08; C01B3/10; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR PRODUCING HIGH PURITY INDUSTRIAL HYDROGEN WHICH INCLUDES REPETITION OF THE SUCCESSIVE STEPS OF (1) PASSING STEAM THROUGH A HOT REFRACTORY MASS COMPOSED OF SUBSTANTIALLY IMPERVIOUS MATERIAL WHICH HAS RELATIVELY LITTLE TENDENCY FOR "BREATHING" AS A RESULT OF ADSORPTION AND ABSORPTION OF GASES PASSED IN CONTACT WITH IT, AND THEREBY RAISING THE TEMPERATURE OF SAID STEAM TO GREATER THAN 650* C., (2) CONTACTING THE HEATED STEAM WITH A MASS OF METALLIC IRON OF A TYPE SUITABLE FOR USE IN A STEAM-IRON PROCESS WHEREIN THE IRON IS CONVERTED TO IRON OXIDE AND INDUSTRIAL HYDROGEN LIBERATED WITH THE EVOLUTION OF HEAT, (3) WITHDRAWING HYDROGEN LIBERATED BY THE REACTION OF SAID STEAM AND SAID METALLIC IRON THROUGH A SECOND REFRACTORY MASS COMPOSED ALSO OF SUBSTANTIALLY IMPREVIOUS MATERIAL, SAID SECOND MASS BEING RELATIVELY COOL AND THEREBY COOLING SAID HYDROGEN
Claim 2
Dependent Claim
137 words
A PROCESS FOR PRODUCING HIGH PURITY INDUSTRIAL HYDROGEN WHICH INCLUDES REPETITION OF THE SUCCESSIVE STEPS OF (1) PASSING STEAM THROUGH A HOT REFRACTORY MASS COMPOSED OF SUBSTANTIALLY IMPERVIOUS MATERIAL WHICH HAS RELATIVELY LITTLE TENDENCY FOR "BREATHING" AS A RESULT OF ADSORPTION AND ABSORPTION OF GASES PASSED IN CONTACT WITH IT, AND THEREBY RAISING THE TEMPERATURE OF SAID STEAM TO GREATER THAN 650* C., (2) CONTACTING THE HEATED STEAM WITH A MASS OF METALLIC IRON OF A TYPE SUITABLE FOR USE IN A STEAM-IRON PROCESS WHEREIN THE IRON IS CONVERTED TO IRON OXIDE AND INDUSTRIAL HYDROGEN LIBERATED WITH THE EVOLUTION OF HEAT, (3) WITHDRAWING HYDROGEN LIBERATED BY THE REACTION OF SAID STEAM AND SAID METALLIC IRON THROUGH A SECOND REFRACTORY MASS COMPOSED ALSO OF SUBSTANTIALLY IMPREVIOUS MATERIAL, SAID SECOND MASS BEING RELATIVELY COOL AND THEREBY COOLING SAID HYDROGEN
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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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |