US3425810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrotreating apparatus
Assignee: Chevron USA Inc
•
Filing: 1965-05-03
•
Granted: 1969-02-04
•
Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 John W Scott Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:00
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0492; B01J8/0446; B01J8/0449; B01J8/0453; C; C10; C10G; C10G49/00; C10G49/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2707163A
Cited
US3235344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |