Patent US6527761B1 successfully refreshed from Google Patents.
US2807156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation process
Assignee: Shell Development Co
•
Filing: 1954-12-13
•
Granted: 1957-09-24
•
Expires: 1974-12-13
Abstract
No abstract record available.
Inventors
- 👤 Jan Roelof Johan Van Dongen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:46
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; B01D3/00; B01D3/42; B01D3/4211; B01D3/4222; B01D5/00; B01D5/0057; B01D5/006; B01D5/0078; B01D5/0093; C; C07; C07C; C07C7/00; C07C7/005; C07C7/04; C10; C10G; C10G5/00; C10G7/00; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR THE SEPARATION OF A MIXTURE OF LOW BOILING VAPOROUS SUBSTANCES COMPRISING DISTILLATION OF THE MIXTURE IN A DISTILLATION ZONE AT SUPERATMOSPHERIC PRESSURE INTO AN OVERHEAD VAPOR STREAM AND A BOTTOMS LIQUID STREAM WHILE SUPPLYING REQUIRED HEAT TO A LOWER PORTIONS OF THE DISTILLATION ZONE, EXPANDING AT LEAST A PORTION OF THE RATED VAPOR STREAM IN A VORTEX TUBE AND WITHDRWAING THEREFROM ONLY A PORTION OF IT AS A VAPOR STREAM AT A REDUCED TEMPERATURE, THE REMAINDER BEING WITHDRAWN AS A SEPARATE VAPOR STREAM AT A HIGHER TEMPERATURE, AND TRANSFERRING COLD FROM THE REDUCED-TEMPERATURE STREAM TO THE UPPER PART OF THE DISTILLATION ZONE.
Claim 2
Dependent Claim
105 words
A PROCESS FOR THE SEPARATION OF A MIXTURE OF LOW BOILING VAPOROUS SUBSTANCES COMPRISING DISTILLATION OF THE MIXTURE IN A DISTILLATION ZONE AT SUPERATMOSPHERIC PRESSURE INTO AN OVERHEAD VAPOR STREAM AND A BOTTOMS LIQUID STREAM WHILE SUPPLYING REQUIRED HEAT TO A LOWER PORTIONS OF THE DISTILLATION ZONE, EXPANDING AT LEAST A PORTION OF THE RATED VAPOR STREAM IN A VORTEX TUBE AND WITHDRWAING THEREFROM ONLY A PORTION OF IT AS A VAPOR STREAM AT A REDUCED TEMPERATURE, THE REMAINDER BEING WITHDRAWN AS A SEPARATE VAPOR STREAM AT A HIGHER TEMPERATURE, AND TRANSFERRING COLD FROM THE REDUCED-TEMPERATURE STREAM TO THE UPPER PART OF THE DISTILLATION ZONE.
References Cited (Backward Citations)
US2134700A
Cited
US2571329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |