US2867628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of compounds absorbed on the catalytic support
Assignee: EIDP Inc
•
Filing: 1954-04-06
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Granted: 1959-01-06
•
Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 Oliver W Cass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:45
CPC Classifications
C; C07; C07D; C07D315/00; C07C; C07C51/00; C07C51/347; C07C51/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
IN THE CATALYTIC HYDROGENATION OF AN UNSATURATED ORGANIC COMPOUND CAPABLE OF BEING HYDROGENATED, THE IMPROVEMENT WHICH COMPRISES (1) PASSING A GASEOUS MIXTURE CONTAINING SAID ORGANIC COMPOUND INTO CONTACT WITH A POROUS ADSORBENT FOR SAID COMPOUND AND THEREBY ADSORBING THE COMPOUND FROM THE GASEOUS MIXTURE, SAID ADSORBENT SERVING AS THE SUPPORT FOR A FINELY-DIVIDED METALLIC CATALYST FOR HYDROGENATING THE COMPOUND, (2) INTERRUPTING THE PASSAGE OF THE MIXTURE INTO CONTACT WITH THE ADSORBENT, AND (3) SUBSEQUENTLY HYDROGENATING THE ORGANIC COMPOUND WHILE IT IS HELD ON THE ADSORBENT.
Claim 2
Dependent Claim
85 words
IN THE CATALYTIC HYDROGENATION OF AN UNSATURATED ORGANIC COMPOUND CAPABLE OF BEING HYDROGENATED, THE IMPROVEMENT WHICH COMPRISES (1) PASSING A GASEOUS MIXTURE CONTAINING SAID ORGANIC COMPOUND INTO CONTACT WITH A POROUS ADSORBENT FOR SAID COMPOUND AND THEREBY ADSORBING THE COMPOUND FROM THE GASEOUS MIXTURE, SAID ADSORBENT SERVING AS THE SUPPORT FOR A FINELY-DIVIDED METALLIC CATALYST FOR HYDROGENATING THE COMPOUND, (2) INTERRUPTING THE PASSAGE OF THE MIXTURE INTO CONTACT WITH THE ADSORBENT, AND (3) SUBSEQUENTLY HYDROGENATING THE ORGANIC COMPOUND WHILE IT IS HELD ON THE ADSORBENT.
Claim 3
Dependent Claim
77 words
IN THE CATALYTIC HYDROGENATION OF MALEIC ANHYDRIDE, THE IMPROVEMENT WHICH COMPRISES (1) PASSING A MIXTURE OF GASES CONTAINING VOLATILIZED MALEIC ANHYDRIDE INTO CONTACT WITH A POROUS ADSORBENT FOR MALEIC ANHYDRIDE SERVING AS A SUPPORT FOR A FINELY-DIVIDED METALLIC HYDROGENATION CATALYST AND THEREBY ADSORBING MALEIC ANHYDRIDE FROM SAID MIXTURE, (2) STOPPING THE PASSING OF THE MIXTURE INTO CONTACT WITH THE POROUS ADSORBENT AND (3) SUBSEQUENTLY HYDROGENATING THE MALEIC ANHYDRIDE WHILE IT IS HELD ADSORBED ON THE POROUS ADSORBENT.
Claim 4
Dependent Claim
77 words
IN THE CATALYTIC HYDROGENATION OF MALEIC ANHYDRIDE, THE IMPROVEMENT WHICH COMPRISES (1) PASSING A MIXTURE OF GASES CONTAINING VOLATILIZED MALEIC ANHYDRIDE INTO CONTACT WITH A POROUS ADSORBENT FOR MALEIC ANHYDRIDE SERVING AS A SUPPORT FOR A FINELY-DIVIDED METALLIC HYDROGENATION CATALYST AND THEREBY ADSORBING MALEIC ANHYDRIDE FROM SAID MIXTURE, (2) STOPPING THE PASSING OF THE MIXTURE INTO CONTACT WITH THE POROUS ADSORBENT AND (3) SUBSEQUENTLY HYDROGENATING THE MALEIC ANHYDRIDE WHILE IT IS HELD ADSORBED ON THE POROUS ADSORBENT.
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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) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |