US3400168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high-purity benzene from cracked petroleum residues
Assignee: Mitsubishi Chemical Corp
•
Filing: 1966-05-26
•
Granted: 1968-09-03
•
Expires: 1986-05-26
Abstract
No abstract record available.
Inventors
- 👤 Fukuda Junichi
- 👤 Masamune Shinobu
- 👤 Suzuki Yasuo
- 👤 Sagara Mitsuo
- 👤 Okabe Yoshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:20
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/12; C10G2400/00; C10G2400/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2876268A
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US3198846A
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US3296323A
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US3222410A
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US3215618A
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US3296120A
Cited
US3310592A
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US3291849A
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US3287431A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |