US3203905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a raney nickeloptically active hydroxy acid hydrogenation catalyst
Assignee: Ajinomoto Co Inc
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Filing: 1963-03-07
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Granted: 1965-08-31
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Expires: 1983-03-07
Abstract
No abstract record available.
Inventors
- 👤 Akabori Shiro
- 👤 Izumi Yoshiharu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; Y; Y10; Y10S; Y10S502/00; Y10S502/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF PREPARING A HYDROGENATION CATALYST WHICH WHICH COMPRISES CONTACTING RANEY NICKEL WITH AN AQUEOUS SOLUTION OF AN OPTICALLY ACTIVE FORM OF AN ALIPHATIC HYDROXY ACID SELECTED FROM THE GROUP CONSISTING OF MALIC ACID AND TARTARIC ACID, THE PH OF SAID SOLUTION BEING BETWEEN 3 AND 10, AND THE TEMPERATURE THEREOF BEING BETWEEN 0*C. AND THE BOILING POINT OF THE SOLUTION.
Claim 2
Independent Claim
62 words
A METHOD OF PREPARING A HYDROGENATION CATALYST WHICH WHICH COMPRISES CONTACTING RANEY NICKEL WITH AN AQUEOUS SOLUTION OF AN OPTICALLY ACTIVE FORM OF AN ALIPHATIC HYDROXY ACID SELECTED FROM THE GROUP CONSISTING OF MALIC ACID AND TARTARIC ACID, THE PH OF SAID SOLUTION BEING BETWEEN 3 AND 10, AND THE TEMPERATURE THEREOF BEING BETWEEN 0*C. AND THE BOILING POINT OF THE SOLUTION.
References Cited (Backward Citations)
US2756243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |