US3551513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of olefins by cracking of liquid hydrocarbon
Assignee: UBE KOGYO KK
•
Filing: 1968-04-23
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Granted: 1970-12-29
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Expires: 1988-04-23
Abstract
No abstract record available.
Inventors
- 👤 Yuichi Suzukawa
- 👤 Hisashi Kono
- 👤 Kenji Terai
- 👤 Takazumi Niwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:28
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/245; C; C10; C10G; C10G9/00; C10G9/28; C10G9/32; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/922
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) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |