US3264831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the separation of gas mixtures
Assignee: Linde GmbH
•
Filing: 1962-01-12
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Granted: 1966-08-09
•
Expires: 1982-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jakob Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:14
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04624; F25J3/0463; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04303; F25J2200/00; F25J2200/04; F25J2205/00; F25J2205/02; F25J2205/24; F25J2215/00; F25J2215/50; F25J2240/00; F25J2240/40; F25J2240/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A METHOD OF SEPARATING A GAS MIXTURE BY TWO STAGE LOW-TEMPERATURE RECTIFICATION TO PRODUCE A HIGHER BOILING POINT MAIN PRODUCT AND A LOWER BOILING POINT RESIDUAL PRODUCT, AND COMPRISING THE STEPS OF PARTIALLY CONDENSING IN THE FIRST STAGE AT DECREASINGG TEMPERATURES THE GAS MIX TURE TO BE SEPARATED AT A PRESSURE OF ABOUT 2.5 TO 4 ATMOSPHERES ABSOLUTE TO RECTIFY THE GAS MIXTURE THEREIN AND TO PRODUCE A LIQUID INTERMEDIATE PRODUCT AND A RESIDUAL GASEOUS MIXTURE, EXPANDING THE LIQUID INTERMEDIATE PRODUCT TO A PRESSURE IN THE RANGE OF ABOUT 1.2 ATMOSPHERES ABSOLUTE TO 2.0 ATMOSPHERES ABSOLUTE, COUNTERFLOWING THE EXPANDED LIQUID INTERMEDIATE PRODUCT AND THE RESIDUAL GASEOUS MIXTURE IN HEAT EXCHANGE RELATIONSHIP TO EACH OTHER TO EVAPORATE THE LIQUID INTERMEDIATE PRODUCT AND TO LIQUEFY THE RESIDUAL GASEOUS MIXTURE, WITHDRAWING THE LOWER BOILING POINT RESIDUAL PRODUCT IN THE GASEOUS STATE FROM THE UPPER PART OF THE SECOND STAGE, COUNTERFLOWING THE LOWER BOILING
Claim 2
Independent Claim
150 words
A METHOD OF SEPARATING A GAS MIXTURE BY TWO STAGE LOW-TEMPERATURE RECTIFICATION TO PRODUCE A HIGHER BOILING POINT MAIN PRODUCT AND A LOWER BOILING POINT RESIDUAL PRODUCT, AND COMPRISING THE STEPS OF PARTIALLY CONDENSING IN THE FIRST STAGE AT DECREASINGG TEMPERATURES THE GAS MIX TURE TO BE SEPARATED AT A PRESSURE OF ABOUT 2.5 TO 4 ATMOSPHERES ABSOLUTE TO RECTIFY THE GAS MIXTURE THEREIN AND TO PRODUCE A LIQUID INTERMEDIATE PRODUCT AND A RESIDUAL GASEOUS MIXTURE, EXPANDING THE LIQUID INTERMEDIATE PRODUCT TO A PRESSURE IN THE RANGE OF ABOUT 1.2 ATMOSPHERES ABSOLUTE TO 2.0 ATMOSPHERES ABSOLUTE, COUNTERFLOWING THE EXPANDED LIQUID INTERMEDIATE PRODUCT AND THE RESIDUAL GASEOUS MIXTURE IN HEAT EXCHANGE RELATIONSHIP TO EACH OTHER TO EVAPORATE THE LIQUID INTERMEDIATE PRODUCT AND TO LIQUEFY THE RESIDUAL GASEOUS MIXTURE, WITHDRAWING THE LOWER BOILING POINT RESIDUAL PRODUCT IN THE GASEOUS STATE FROM THE UPPER PART OF THE SECOND STAGE, COUNTERFLOWING THE LOWER BOILING
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |