US3546316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of coke formation in steam cracking processes
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1968-02-09
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Granted: 1970-12-08
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Expires: 1988-02-09
Abstract
No abstract record available.
Inventors
- 👤 Ihor Koszman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:33
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16; C07; C07C; C07C4/00; C07C4/02; C07C4/04; C07C7/00; C07C7/12; C07C7/148; C07C7/14833; C10G21/00; C10G21/06; C10G21/12; C10G21/20; C10G25/00; C10G25/003; C10G55/00; C10G55/02; C10G55/04; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 0
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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) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |