US2849379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling recycle hydrogen gas
Assignee: Standard Oil Co
•
Filing: 1954-12-29
•
Granted: 1958-08-26
•
Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 Robert J Hengstebeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:09
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/10; C10G35/14; C10G35/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A PROCESS FOR CONVERSION OF A HYDROCARBON CHARGE STOCK IN THE PRESENCE OF A CATALYST AND HYDROGEN-RICH RECYCLE GAS WHEREIN THE HYDROGEN-RICH GAS IS SEPARATED FROM CONVERSION PRODUCTS IN A FLASH ZONE AND IS RECYCLED TO THE CONVERSION ZONE BY MEANS OF A COMPRESSOR, THE METHOD OF MAINTAINING COMPRESSOR SPEED SUBSTANTIALLY CONSTANT AT CONSTANT DISCHARGE PRESSURE WHILE MAINTAINING THE PRESSURE DROP OF RECYCLE GAS THROUGH THE COMPRESSOR FLOW CONTROL ORIFICE CONSTANT WHICH COMPRISES CONTROLLING THE SPEED OF SAID COMPRESSOR TO COMPENSATE FOR INCIPIENT CHANGES IN SAID PRESSURE DROP, AND REGULATING THE TEMPERATURE IN THE FLASH ZONE IN RESPONSE TO INCIPIENT CHANGES IN COMPRESSOR SPEED SO AS TO MAINTAIN THE MOLECULAR WEIGHT OF THE GAS SEPARATED THEREFROM SUBSTANTIALLY CONSTANT.
Claim 2
Dependent Claim
119 words
IN A PROCESS FOR CONVERSION OF A HYDROCARBON CHARGE STOCK IN THE PRESENCE OF A CATALYST AND HYDROGEN-RICH RECYCLE GAS WHEREIN THE HYDROGEN-RICH GAS IS SEPARATED FROM CONVERSION PRODUCTS IN A FLASH ZONE AND IS RECYCLED TO THE CONVERSION ZONE BY MEANS OF A COMPRESSOR, THE METHOD OF MAINTAINING COMPRESSOR SPEED SUBSTANTIALLY CONSTANT AT CONSTANT DISCHARGE PRESSURE WHILE MAINTAINING THE PRESSURE DROP OF RECYCLE GAS THROUGH THE COMPRESSOR FLOW CONTROL ORIFICE CONSTANT WHICH COMPRISES CONTROLLING THE SPEED OF SAID COMPRESSOR TO COMPENSATE FOR INCIPIENT CHANGES IN SAID PRESSURE DROP, AND REGULATING THE TEMPERATURE IN THE FLASH ZONE IN RESPONSE TO INCIPIENT CHANGES IN COMPRESSOR SPEED SO AS TO MAINTAIN THE MOLECULAR WEIGHT OF THE GAS SEPARATED THEREFROM SUBSTANTIALLY CONSTANT.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |