US2799141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-fractionating device
Assignee: US Philips Corp
•
Filing: 1954-10-05
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Granted: 1957-07-16
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Expires: 1974-10-05
Abstract
No abstract record available.
Inventors
- 👤 Jonkers Cornelius Otto
- 👤 Kohler Jacob Willem Laurens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:11
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/905; Y10S62/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A GAS-FRACTIONATING DEVICE COMPRISING A GAS-FRACTIONATING COLUMN PROVIDED WITH A BOILING VESSEL, A COLD-GAS REFRIGERATOR FOR WITHDRAWING HEAT FROM SAID COLUMN INCLUDING OUTLET MEANS, MEANS FOR DRAWING OFF VAPOR FROM SAID COLUMN, SAID VAPOR BEING CONDENSED BY SAID COLD-GAS REFRIGERATOR, MEANS FOR CREATING A VAPOR LIFT PUMP EFFECT WHEREBY AT LEAST PART OF THE CONDENSATE IS SUPPLIED TO THE COLUMN AT A POINT SITUATED ABOVE SAID OUTLET OF THE COLD-
Claim 2
Dependent Claim
70 words
A GAS-FRACTIONATING DEVICE COMPRISING A GAS-FRACTIONATING COLUMN PROVIDED WITH A BOILING VESSEL, A COLD-GAS REFRIGERATOR FOR WITHDRAWING HEAT FROM SAID COLUMN INCLUDING OUTLET MEANS, MEANS FOR DRAWING OFF VAPOR FROM SAID COLUMN, SAID VAPOR BEING CONDENSED BY SAID COLD-GAS REFRIGERATOR, MEANS FOR CREATING A VAPOR LIFT PUMP EFFECT WHEREBY AT LEAST PART OF THE CONDENSATE IS SUPPLIED TO THE COLUMN AT A POINT SITUATED ABOVE SAID OUTLET OF THE COLD-
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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |