US3079759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of gaseous mixtures
Assignee: Air Products and Chemicals Inc
•
Filing: 1961-03-22
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Granted: 1963-03-05
•
Expires: 1981-03-22
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:25
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04006; F25J3/04078; F25J3/0409; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/04436; F25J3/04442; F25J3/04642; F25J3/04648; F25J3/04654; F25J3/04709; F25J2200/00; F25J2200/32; Y; Y10; Y10S; Y10S62/00; Y10S62/923; Y10S62/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A METHOD OF SEPARATING GASEOUS MIXTURE BY LOW TEMPRATURE FRACTIONATION IN WHICH SEPARATION TAKES PLACE IN A HIGH PRESSURE FRACTIONATING ZONE TO PROVIDE GASEOUS LOW BOILING FRACTION AND LIQUID HIGH BOILING FRACTION AND IN WHICH LIQUID HIGH BOILING FRACTION IS FED TO A LOW PRESSURE FRACTIONATING ZONE TO PROVIDE GASEOUS LOW BOILING COMPONENT AND LIQUID HIGH BOILING COMPONENT, COMPRISING THE STEPS OF SUBJECTING GASEOUS MIXTURE TO BE SEPARETED TO PRELIMINARY SEPARATION TO PROVIDE LOW BOILING COMPONENT OF THE GASEOUS MIXTURE IN VAPOR PHASE AND A SECOND FRACTION, INTRODUCING THUS-SEPARATED SECOND FRACTION INTO THE HIGH PRESSURE FRACTIONATING ZONE, LIQUEFYING THUS-SEPARATED LOW BOILING COMPONENT IN VAPOR PHASE, AND UTILIZING THUS-
Claim 2
Dependent Claim
109 words
IN A METHOD OF SEPARATING GASEOUS MIXTURE BY LOW TEMPRATURE FRACTIONATION IN WHICH SEPARATION TAKES PLACE IN A HIGH PRESSURE FRACTIONATING ZONE TO PROVIDE GASEOUS LOW BOILING FRACTION AND LIQUID HIGH BOILING FRACTION AND IN WHICH LIQUID HIGH BOILING FRACTION IS FED TO A LOW PRESSURE FRACTIONATING ZONE TO PROVIDE GASEOUS LOW BOILING COMPONENT AND LIQUID HIGH BOILING COMPONENT, COMPRISING THE STEPS OF SUBJECTING GASEOUS MIXTURE TO BE SEPARETED TO PRELIMINARY SEPARATION TO PROVIDE LOW BOILING COMPONENT OF THE GASEOUS MIXTURE IN VAPOR PHASE AND A SECOND FRACTION, INTRODUCING THUS-SEPARATED SECOND FRACTION INTO THE HIGH PRESSURE FRACTIONATING ZONE, LIQUEFYING THUS-SEPARATED LOW BOILING COMPONENT IN VAPOR PHASE, AND UTILIZING THUS-
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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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |