US2875148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative hydrocarbon cracking process in series
Assignee: Phillips Petroleum Co
•
Filing: 1952-01-11
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Granted: 1959-02-24
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Expires: 1972-01-11
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Scofield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:24
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/46; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/54; C10; C10G; C10G2400/00; C10G2400/20; C10G2400/30; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A CRACKING PROCESS IN WHICH A HYDROCARBON FEED STREAM IS CRACKED BY PASSING IT THROUGH A FIRST REGENERATIVE ZONE MAINTAINED AT CRACKING TEMPERATURE AND THEN THROUGH A SECOND REGENERATIVE ZONE MAINTAINED AT A LOWER TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID STREAM, AT A LOCUS OF INCIPIENT CRACKING, A SMALL PROPORTION OF SAID FEED, CRACKED, AND AT A TEMPERATURE BELOW CRACKING TEMPERATURE, GRADUALLY DECREASING SAID PROPORTION OF ADDED HYDROCARBON, AND RECOVERING CRACKING PRODUCTS.
Claim 2
Dependent Claim
75 words
IN A CRACKING PROCESS IN WHICH A HYDROCARBON FEED STREAM IS CRACKED BY PASSING IT THROUGH A FIRST REGENERATIVE ZONE MAINTAINED AT CRACKING TEMPERATURE AND THEN THROUGH A SECOND REGENERATIVE ZONE MAINTAINED AT A LOWER TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID STREAM, AT A LOCUS OF INCIPIENT CRACKING, A SMALL PROPORTION OF SAID FEED, CRACKED, AND AT A TEMPERATURE BELOW CRACKING TEMPERATURE, GRADUALLY DECREASING SAID PROPORTION OF ADDED HYDROCARBON, AND RECOVERING CRACKING PRODUCTS.
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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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |