Patent US3243386A successfully refreshed from Google Patents.
US3243386A
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Catalyst for the synthesis of ammonia and method of producing same
Assignee: Wargons AB
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Filing: 1961-07-20
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Granted: 1966-03-29
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Expires: 1981-07-20
Abstract
No abstract record available.
Inventors
- 👤 Nielsen Anders
- 👤 Bergh Sven Sigvard
- 👤 Troberg Bolge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:16
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0411; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78; B01J37/00; B01J37/0009; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PRE-CATALYST FOR USE IN THE SYNTHESIS OF AMMONIA CONSISTING OF COMPRESSED SINTERED BODIES HAVING A SIZE RANGE OF 1.2 TO 2.5 MM. SAID BODIES CONTAINING IRON OXIDE AT AN OXIDATION LEVEL APPROXIMATELY THAT OF FE3O4 AS THE MAJOR INGREDIENT BY WEIGHT TOGETHER WITH PROMOTER COMPONENTS OF APPROXIMATELY 0.65% K2O, 2.9% CAO, 3.3% AL2O3, 0.06% BEO AND 1.2% SIO2 BY WEIGHT.
Claim 2
Dependent Claim
61 words
A PRE-CATALYST FOR USE IN THE SYNTHESIS OF AMMONIA CONSISTING OF COMPRESSED SINTERED BODIES HAVING A SIZE RANGE OF 1.2 TO 2.5 MM. SAID BODIES CONTAINING IRON OXIDE AT AN OXIDATION LEVEL APPROXIMATELY THAT OF FE3O4 AS THE MAJOR INGREDIENT BY WEIGHT TOGETHER WITH PROMOTER COMPONENTS OF APPROXIMATELY 0.65% K2O, 2.9% CAO, 3.3% AL2O3, 0.06% BEO AND 1.2% SIO2 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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |