Patent US3004628A successfully refreshed from Google Patents.
US3004628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectified absorption method for the separation of hydrogen isotopes
Assignee: Individual
•
Filing: 1957-07-17
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Granted: 1961-10-17
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Expires: 1977-07-17
Abstract
No abstract record available.
Inventors
- 👤 Hunt Charles D Ancona
- 👤 Donald N Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:46
CPC Classifications
C; C01; C01B; C01B4/00; B; B01; B01D; B01D53/00; B01D53/02; B01D53/025; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A PROCESS FOR SEPARATING HYDROGEN ISOTOPES FROM A PLANT PROCESS HYDROGEN FEED STREAM MIXTURE CONTAINING LIGHT AND HEAVY GASEOUS ELEMENTAL HYDROGEN ISOTOPES AND GASEOUS NITROGEN, THE STEPS COMPRISING PASSING SAID MIXTURE THROUGH A FEED PREPARATION UNIT TO BE DISCHARGED AS A FEED STREAM CONSISTING ESSENTIALLY OF GASEOUS H2, HD AND NITROGEN AT AN INITIAL TEMPERATURE BELOW THE CRITICAL TEMPERATURE OF SAID MIXTURE AND AN INITIAL PRESSURE ABOVE THE CRITICAL PRESSURE SO THAT A PORTION OF SAID NITROGEN EXISTS AS A LIQUID NONPOLAR SOLVENT IN THE DISCHARGED FEED STREAM, PASSING THE FEED STREAM THROUGH A MULTISTAGE ABSORPTION COLUMN TO DISCHARGE FROM AN UPPER PORTION THEREOF AND RECYCLE THROUGH SAID FEED PREPARATION UNIT AS A COOLANT, COUNTERCURRENTLY PASSING LIQUID NITROGEN SOLVENT THROUGH SAID COLUMN TO CONTACT AND SELECTIVELY ABSORB HD
Claim 2
Dependent Claim
129 words
IN A PROCESS FOR SEPARATING HYDROGEN ISOTOPES FROM A PLANT PROCESS HYDROGEN FEED STREAM MIXTURE CONTAINING LIGHT AND HEAVY GASEOUS ELEMENTAL HYDROGEN ISOTOPES AND GASEOUS NITROGEN, THE STEPS COMPRISING PASSING SAID MIXTURE THROUGH A FEED PREPARATION UNIT TO BE DISCHARGED AS A FEED STREAM CONSISTING ESSENTIALLY OF GASEOUS H2, HD AND NITROGEN AT AN INITIAL TEMPERATURE BELOW THE CRITICAL TEMPERATURE OF SAID MIXTURE AND AN INITIAL PRESSURE ABOVE THE CRITICAL PRESSURE SO THAT A PORTION OF SAID NITROGEN EXISTS AS A LIQUID NONPOLAR SOLVENT IN THE DISCHARGED FEED STREAM, PASSING THE FEED STREAM THROUGH A MULTISTAGE ABSORPTION COLUMN TO DISCHARGE FROM AN UPPER PORTION THEREOF AND RECYCLE THROUGH SAID FEED PREPARATION UNIT AS A COOLANT, COUNTERCURRENTLY PASSING LIQUID NITROGEN SOLVENT THROUGH SAID COLUMN TO CONTACT AND SELECTIVELY ABSORB HD
References Cited (Backward Citations)
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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) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |