US3135699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for regenerating a hydrogenation catalyst
Assignee: FMC Corp
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Filing: 1961-04-20
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Granted: 1964-06-02
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Expires: 1981-04-20
Abstract
No abstract record available.
Inventors
- 👤 Herzog Hans
- 👤 Kabisch Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:44
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023; B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
PROCESS OF REGENERATING A DEACTIVATED HYDROGENATION SUSPENSION CATALYST COMPRISING A NOBLE METAL, IN WHICH SAID DEACTIVATED CATALYST IS TREATED WITH LIQUID AMMONIA AT A LOW TEMPERATURE AT WHICH AMMONIA IS LIQUID UNTIL THE CATALYTIC ACTIVITY OF THE TREATED CATALYST IS IMPROVED.
Claim 2
Dependent Claim
41 words
PROCESS OF REGENERATING A DEACTIVATED HYDROGENATION SUSPENSION CATALYST COMPRISING A NOBLE METAL, IN WHICH SAID DEACTIVATED CATALYST IS TREATED WITH LIQUID AMMONIA AT A LOW TEMPERATURE AT WHICH AMMONIA IS LIQUID UNTIL THE CATALYTIC ACTIVITY OF THE TREATED CATALYST IS IMPROVED.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |