US3770658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia synthesis catalyst
Assignee: GASOLINE CO Ltd
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Filing: 1971-06-21
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Granted: 1973-11-06
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Expires: 1991-06-21
Abstract
Abstract IN SYNTHESIZING AMMONIA THROUGH REACTION BETWEEN NITROGEN AND HYDROGEN, IT IS POSSIBLE TO EFFECT SAID SYNTHESIS AT A LOWER TEMPERATURE BY THE USE OF A CATALYST COMPRISING AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF TRANSITION METALS BELONGING TO VI-B GROUP, VII-B GROUP AND VIII GROUP OF PERIOD TABLE AND AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, BOTH OF SAID ELEMENTS BEING SUBSTANTIALLY IN METALLIC STATE, TOGETHER WITH A PROMOTER OR A SUPPORT IN ADDITION THERETO AS OCCASION DEMANDS.
Inventors
- 👤 A Ozaki
- 👤 K Aika
- 👤 A Furuta
- 👤 A Okagami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:33
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0411; B; B01; B01J; B01J23/00; B01J23/16; B01J23/70; B01J23/76; B01J23/02; B01J23/04; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |