Patent US3331753A successfully refreshed from Google Patents.
US3331753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat removed from refluxed fluids as a ratio of withdrawn product in fractionation control
Assignee: Sunoco Inc
•
Filing: 1965-08-06
•
Granted: 1967-07-18
•
Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 Lewis H Foester
- 👤 Robert H Livesay
- 👤 Paul K Mattheiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:47
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4216; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10S208/00; Y10S208/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A FRACTIONATION SYSTEM WHEREIN A FEED MIXTURE OF TWO OR MORE COMPONENTS IS DIRECTED TO A FRACTIONATION UNIT, A VAPOR STRAM IS WITHDRAWN FROM THE TOP OF THE UNIT, SAID VAPOR STREAM IS COOLED TO CONDENSE AT LEAST A PART OF SAME, A PART OF THE RESULTING CONDENSATE IS RETURNED TO SAID UNIT AS REFLUX, A HOT LIQUID STREAM IS WITHDRAWN FROM SAID UNIT AT A POINT REMOVED FROM THE TOP THEREOF, SAID LIQUID STREAM IS COOLED, AND THE COOLED LIQUID STREAM IS MIXED WITH SAID PART OF SAID CONDNSATE FOR REFLUX INTO SAID UNIT; A CONTROL SYSTEM COMPRISING MEANS FOR ESTAB-
Claim 2
Dependent Claim
103 words
IN A FRACTIONATION SYSTEM WHEREIN A FEED MIXTURE OF TWO OR MORE COMPONENTS IS DIRECTED TO A FRACTIONATION UNIT, A VAPOR STRAM IS WITHDRAWN FROM THE TOP OF THE UNIT, SAID VAPOR STREAM IS COOLED TO CONDENSE AT LEAST A PART OF SAME, A PART OF THE RESULTING CONDENSATE IS RETURNED TO SAID UNIT AS REFLUX, A HOT LIQUID STREAM IS WITHDRAWN FROM SAID UNIT AT A POINT REMOVED FROM THE TOP THEREOF, SAID LIQUID STREAM IS COOLED, AND THE COOLED LIQUID STREAM IS MIXED WITH SAID PART OF SAID CONDNSATE FOR REFLUX INTO SAID UNIT; A CONTROL SYSTEM COMPRISING MEANS FOR ESTAB-
References Cited (Backward Citations)
US3212997A
Cited
US3224947A
Cited
US3271269A
Cited
US3271270A
Cited
US3239457A
Cited
US3165454A
Cited
US3143643A
Cited
US3272722A
Cited
US3259734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |