Patent US3531394A successfully refreshed from Google Patents.
US3531394A
Expired / Lapsed
US
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Antifoulant additive for steam-cracking process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-04-25
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Granted: 1970-09-29
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Expires: 1988-04-25
Abstract
No abstract record available.
Inventors
- 👤 Ihor Koszman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:14
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/04; B; B01; B01J; B01J19/00; B01J19/0006; B01J19/002; B01J19/0026; C10; C10G; C10G9/00; C10G9/14; C10G9/16; 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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |