US3537977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refinery utilizing hydrogen produced from a portion of the feed
Assignee: Chevron USA Inc
•
Filing: 1968-07-08
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Granted: 1970-11-03
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Expires: 1988-07-08
Abstract
No abstract record available.
Inventors
- 👤 Calvin S Smith Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/12; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/36; C01B3/50; C10G49/00; C10G49/007; C01B2203/00; C01B2203/04; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/0485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3012962A
Cited
US2911352A
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US3008895A
Cited
US3120993A
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US3254020A
Cited
US3240694A
Cited
US3380910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |