Patent US3527832A successfully refreshed from Google Patents.
US3527832A
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Coke prevention in steam cracking
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-01-02
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Granted: 1970-09-08
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Expires: 1988-01-02
Abstract
No abstract record available.
Inventors
- 👤 Nicholas C Pamphilis
- 👤 John A Kivlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:16
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/026; F28F9/027; F28F9/0275; C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; F28F19/00; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/949; Y10S585/95; Y10T; Y10T137/00; Y10T137/0318
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) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |