Patent US3519557A successfully refreshed from Google Patents.
US3519557A
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US
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Controlled hydrogenation process
Assignee: Sunoco Inc
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Filing: 1969-08-15
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Granted: 1970-07-07
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Expires: 1989-08-15
Abstract
No abstract record available.
Inventors
- 👤 Carl E Pruiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:03
CPC Classifications
C; C10; C10G; C10G47/00; C10G65/00; C10G65/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3239454A
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US3341613A
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US3349027A
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US3382168A
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US3362901A
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US3367860A
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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) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |