US2544771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-chromium hydrogenation catalyst
Assignee: Union Carbide Corp
•
Filing: 1943-10-14
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Granted: 1951-03-13
•
Expires: 1963-10-14
Abstract
No abstract record available.
Inventors
- 👤 Donald M Young
- 👤 Jr Frank G Young
- 👤 Howard R Guest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/143; C07C29/145; Y; Y10; Y10S; Y10S252/00; Y10S252/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A COPPER-CHROMIUM MIXED OXIDES HYDROGENATION CATALYST IN WHICH THE CHROMIUM IS PRESENT IN A RATIO, COMPUTED ON A METAL BASIS, FROM ABOUT 9 TO 15 PARTS CHROMIUM PER 100 PARTS COPPER, BY WEIGHT.
Claim 2
Dependent Claim
33 words
A COPPER-CHROMIUM MIXED OXIDES HYDROGENATION CATALYST IN WHICH THE CHROMIUM IS PRESENT IN A RATIO, COMPUTED ON A METAL BASIS, FROM ABOUT 9 TO 15 PARTS CHROMIUM PER 100 PARTS COPPER, BY WEIGHT.
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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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |