US2914393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nitrogen-bearing carbonyl iron powder
Assignee: GAF Chemicals Corp
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Filing: 1957-01-07
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Granted: 1959-11-24
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Expires: 1977-01-07
Abstract
No abstract record available.
Inventors
- 👤 Beller Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/30; B22F9/305
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
40 words
IN THE PRODUCTION OF IRON POWDER FROM IRON CARBONYL, THE STEP OF HEAT PRECIPITATING THE IRON CARFROM THE CARBONYL, IN THE PRESENCE OF AMOUNTS OF AMMONIA WITHIN THE RANGE BETWEN 1/2 MOL. AND 4 MOLS. PER MOL. OF CARBONYL GAS.
Claim 2
Dependent Claim
40 words
IN THE PRODUCTION OF IRON POWDER FROM IRON CARBONYL, THE STEP OF HEAT PRECIPITATING THE IRON CARFROM THE CARBONYL, IN THE PRESENCE OF AMOUNTS OF AMMONIA WITHIN THE RANGE BETWEN 1/2 MOL. AND 4 MOLS. PER MOL. OF CARBONYL GAS.
Claim 3
Dependent Claim
23 words
AN ARTICLE OF MANUFACTURE COMPRISING AN IRON POWDER HAVING A PARTICLE SIZE OF APPROXIMATELY 4.5 MICRONS AND CONTAINING 0.5 TO 0.6% OF NITROGEN.
Claim 4
Dependent Claim
23 words
AN ARTICLE OF MANUFACTURE COMPRISING AN IRON POWDER HAVING A PARTICLE SIZE OF APPROXIMATELY 4.5 MICRONS AND CONTAINING 0.5 TO 0.6% OF NITROGEN.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |