US3539500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Start-up method for a low-temperature hydrogenation process
Assignee: Standard Oil Co
•
Filing: 1968-01-30
•
Granted: 1970-11-10
•
Expires: 1988-01-30
Abstract
No abstract record available.
Inventors
- 👤 John A Brooks
- 👤 Lyle M Lovell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:01
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/24; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3234298A
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US3221078A
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US3238269A
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US3296120A
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US3309307A
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US3328477A
Cited
US3287258A
Cited
US3429804A
Cited
US3388056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |