US3538019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel phosphate-promoted supported nickel catalyst
Assignee: Zeneca Inc
•
Filing: 1968-03-07
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Granted: 1970-11-03
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Expires: 1988-03-07
Abstract
No abstract record available.
Inventors
- 👤 Robert J Capik
- 👤 Leon W Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:30
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; C; C07; C07C; C07C31/00; C07C31/18; C07C31/26; B01J37/00; B01J37/02; B01J37/0201
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |