Patent US3579438A successfully refreshed from Google Patents.
US3579438A
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Thermal cracking
Assignee: Monsanto Co
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Filing: 1970-04-20
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Granted: 1971-05-18
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Expires: 1990-04-20
Abstract
Abstract A PROCESS FOR THERMALLY CRACKING A NORMALLY LIQUID HYDROCARBON IN A TUBULART REACTOR WHEREIN C4 AND HIGHER HYDROCARBONS ARE INJECTED PRIOR TO THE QUENCH ZONE.
Inventors
- 👤 Carl M Cruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:31
CPC Classifications
C; C10; C10G; C10G9/00; C10G2400/00; C10G2400/20; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |