US2508705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulverulent iron of improved electromagnetic properties
Assignee: GAF Chemicals Corp
•
Filing: 1946-01-18
•
Granted: 1950-05-23
•
Expires: 1966-01-18
Abstract
No abstract record available.
Inventors
- 👤 Beller Hans
- 👤 George O Altmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:59
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A METHOD OF PRODUCING POWDERED IRON WHICH COMBINES HIGH PERMEABILITY AND LOW EDDY CURRENT LOSSES WHEN FORMED INTO SHAPED ARTICLES, THE STEP, WHICH COMPRISES REDUCING IRON POWDER OBTAINED BY THE THERMO-DECOMPOSITION OF IORN CARBONYL, THE PATICLES OF WHICH ARE SPHERICAL IN SHAPE AND HAVE AN AVERAGE DIAMETER OF LESS THAN 12 MICRONS, WITH A REDUCING GAS OF THE CLASS CONSISTING OF HYDROGEN AND AMMONIA AT A TEMPERATURE SUFFICIENTLY HIGH TO REDUCE THE CARBON CON-
Claim 2
Dependent Claim
75 words
IN A METHOD OF PRODUCING POWDERED IRON WHICH COMBINES HIGH PERMEABILITY AND LOW EDDY CURRENT LOSSES WHEN FORMED INTO SHAPED ARTICLES, THE STEP, WHICH COMPRISES REDUCING IRON POWDER OBTAINED BY THE THERMO-DECOMPOSITION OF IORN CARBONYL, THE PATICLES OF WHICH ARE SPHERICAL IN SHAPE AND HAVE AN AVERAGE DIAMETER OF LESS THAN 12 MICRONS, WITH A REDUCING GAS OF THE CLASS CONSISTING OF HYDROGEN AND AMMONIA AT A TEMPERATURE SUFFICIENTLY HIGH TO REDUCE THE CARBON CON-
References Cited (Backward Citations)
US1735405A
Cited
US1783561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |