US2645604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tandem-bed hydroforming process
Assignee: Phillips Petroleum Co
•
Filing: 1949-09-07
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Granted: 1953-07-14
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Expires: 1969-09-07
Abstract
No abstract record available.
Inventors
- 👤 Clark Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:16
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE HYDROFORMING OF A NAPHTHA WHICH COMPRISES PASSING SAID NAPHTHA AT A TEMPERATURE IN THE RANGE 950*-1050* F. AND A PRESSURE IN THE RANGE OF 200 TO 250 POUNDS PER SQUARE INCH GAGE INTO CONTACT WITH A CHROMIA-ALUMINA CATALYST IN A FIRST STAGE AND THEN PASSING THE EFFLUENT FROM SAID STAGE IMMEDIATELY AND WITHOUT ANY ADDITIONAL INTERMEDIATE STEP DIRECTLY INTO CONTACT WITH A MOLYBDENUM OXIDE-ALUMINA CATALYST UNDER HYDROFORMING CONDITIONS IN A SECOND STAGE IN WHICH THE TEMPERATURE PREVAILING IS LOWER THAN THAT IN SAID FIRST STAGE AND IS IN THE RANGE 850*-930* F. AND THE PRESSURE IN SAID SECOND STAGE IS SUBSTANTIALLY THE SAME AS IN SAID FIRST STAGE.
Claim 2
Dependent Claim
109 words
THE HYDROFORMING OF A NAPHTHA WHICH COMPRISES PASSING SAID NAPHTHA AT A TEMPERATURE IN THE RANGE 950*-1050* F. AND A PRESSURE IN THE RANGE OF 200 TO 250 POUNDS PER SQUARE INCH GAGE INTO CONTACT WITH A CHROMIA-ALUMINA CATALYST IN A FIRST STAGE AND THEN PASSING THE EFFLUENT FROM SAID STAGE IMMEDIATELY AND WITHOUT ANY ADDITIONAL INTERMEDIATE STEP DIRECTLY INTO CONTACT WITH A MOLYBDENUM OXIDE-ALUMINA CATALYST UNDER HYDROFORMING CONDITIONS IN A SECOND STAGE IN WHICH THE TEMPERATURE PREVAILING IS LOWER THAN THAT IN SAID FIRST STAGE AND IS IN THE RANGE 850*-930* F. AND THE PRESSURE IN SAID SECOND STAGE IS SUBSTANTIALLY THE SAME AS IN SAID FIRST STAGE.
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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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |