US3711568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrolysis process
Assignee: Individual
•
Filing: 1970-09-24
•
Granted: 1973-01-16
•
Expires: 1990-09-24
Abstract
Abstract This disclosure teaches a process for pyrolysis of hydrocarbons wherein at least two pyrolysis product are recycled to two different points in the pyrolysis furnace. Three or more pyrolysis products are recycled and introduced into the furnace at a plurality of points on the pyrolysis path.
Inventors
- 👤 H Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:33
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/04; C10; C10G; C10G9/00; C10G9/14; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/924
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
The process according to claim 1 wherein: at least three pyrolysis products are produced each different from the other and from the feed, and a portion of each of these pyrolysis products are recycled each to a different point along the pyrolysis zone between the inlet end and the outlet end.
References Cited (Backward Citations)
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US2668791A
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US2972647A
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US3470263A
Cited
US3579601A
Cited
US3565970A
Cited
US3579438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |