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US3494857A
Expired / Lapsed
US
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Process for the hydrogenation of unsaturated hydrocarbons
Assignee: Gulf Research and Development Co
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Filing: 1968-05-10
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Granted: 1970-02-10
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Expires: 1988-05-10
Abstract
No abstract record available.
Inventors
- 👤 Howard G Mcilvried
- 👤 Raynor T Sebulsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:47
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3016347A
Cited
US3094481A
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US3211669A
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US3258431A
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US3328477A
Cited
US3309421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |