US3498753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for thermal cracking of hydrocarbon
Assignee: Zeon Corp
•
Filing: 1967-06-27
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Granted: 1970-03-03
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Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 Hiroshi Hokari
- 👤 Takeo Koide
- 👤 Shigemitu Koyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/34; C10G9/36; C10G9/38; C10G2400/00; C10G2400/20; Y; Y02; Y02P; Y02P30/00; Y02P30/40; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/922; Y10S585/923; Y10S585/924
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) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |