Patent US4056386A successfully refreshed from Google Patents.
US4056386A
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Method for decomposing iron pentacarbonyl
Assignee: United States Department of the Navy
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Filing: 1977-04-19
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Granted: 1977-11-01
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Expires: 1997-04-19
Abstract
Abstract A homogeneous gaseous catalyst such as H 2 , NO, PF 3 , PH 3 , NH 3 or a halogen is used to speed the decomposition of gaseous iron pentacarbonyl into solid iron and gaseous carbon monoxide.
Inventors
- 👤 William S. McEwan
- 👤 Hans B. Jonassen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:35
CPC Classifications
C; C21; C21B; C21B15/00; C21B15/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
In a method for producing iron comprising the steps of providing iron pentacarbonyl and subjecting the iron pentacarbonyl to an elevated temperature to cause it to decompose into iron and carbon monoxide the improvement residing in utilizing as a catalyst to speed the rate of decomposition, a gas selected from the group consisting of H 2 , NO, PF 3 , PH 3 , NH 3 and I 2 .
Claim 2
Dependent Claim
70 words
In a method for producing iron comprising the steps of providing iron pentacarbonyl and subjecting the iron pentacarbonyl to an elevated temperature to cause it to decompose into iron and carbon monoxide the improvement residing in utilizing as a catalyst to speed the rate of decomposition, a gas selected from the group consisting of H 2 , NO, PF 3 , PH 3 , NH 3 and I 2 .
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the gas selected is H 2 .
Claim 4
Dependent Claim
16 words
A method according to claim 2 wherein the H 2 is mixed with N 2 .
Claim 5
Dependent Claim
33 words
A method according to claim 3 wherein from 2 parts of H 2 per 298 parts of N 2 to 10 parts of H 2 per 290 parts of N 2 are used.
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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |