US3489809A
Expired / Lapsed
US
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Selective hydrogenation with a catalyst on a honeycomb support
Assignee: Engelhard Minerals and Chemicals Corp
•
Filing: 1968-04-17
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Granted: 1970-01-13
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Expires: 1988-04-17
Abstract
No abstract record available.
Inventors
- 👤 Carl D Keith
- 👤 Philip L Romeo Sr
- 👤 Otto J Adlhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:49
CPC Classifications
C; C11; C11C; C11C3/00; C11C3/12; C11C3/126; C07; C07C; C07C7/00; C07C7/148; C07C7/163; C07C7/167; C11C3/123; B; B01; B01J; B01J2235/00; B01J2235/15; B01J35/00; B01J35/30; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3113980A
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US3116342A
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US3189563A
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US3155627A
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US3255027A
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US3397154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |