US3843349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making fine powders
Assignee: VISTATECH Corp A CORP OF
•
Filing: 1973-06-06
•
Granted: 1974-10-22
•
Expires: 1993-06-06
Abstract
Abstract 1. A METHOD OF MAKING FERROMAGNETIC PARTICLES OR METALLIC PARTICLES COMPRISING THE STEPS OF COATING A MASS OF PARTICLES OF A SALT OF A METAL AND AN ORGANIC ACID WITH A FILM FORMING ORGANIC MATERIAL REDUCING SAID COATED SALT PARTICLES IN A GASEOUS REDUCING ATMOSPHERE TO METAL PARTICLES, AND COOLING THE METAL PARTICLES BELOW THEIR SINTERING TEMPERATURE, SAID REDUCTION AND COOLING BEING CARRIED OUT WHILE MAINTAINING THE METAL PARTICLES IN THE PRESENCE OF EITHER THE SEPARATION MEDIUM OR A THERMAL DECOMPOSITION RESIDUE THEREOF.
Inventors
- 👤 J Ehrreich
- 👤 A Reti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70605; B; B22; B22F; B22F1/00; B22F1/10; B22F1/102; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/061; H01F1/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF MAKING FERROMAGNETIC PARTICLES OR METALLIC PARTICLES COMPRISING THE STEPS OF COATING A MASS OF PARTICLES OF A SALT OF A METAL AND AN ORGANIC ACID WITH A FILM FORMING ORGANIC MATERIAL REDUCING SAID COATED SALT PARTICLES IN A GASEOUS REDUCING ATMOSPHERE TO METAL PARTICLES, AND COOLING THE METAL PARTICLES BELOW THEIR SINTERING TEMPERATURE, SAID REDUCTION AND COOLING BEING CARRIED OUT WHILE MAINTAINING THE METAL PARTICLES IN THE PRESENCE OF EITHER THE SEPARATION MEDIUM OR A THERMAL DECOMPOSITION RESIDUE THEREOF.
Claim 2
Independent Claim
82 words
A METHOD OF MAKING FERROMAGNETIC PARTICLES OR METALLIC PARTICLES COMPRISING THE STEPS OF COATING A MASS OF PARTICLES OF A SALT OF A METAL AND AN ORGANIC ACID WITH A FILM FORMING ORGANIC MATERIAL REDUCING SAID COATED SALT PARTICLES IN A GASEOUS REDUCING ATMOSPHERE TO METAL PARTICLES, AND COOLING THE METAL PARTICLES BELOW THEIR SINTERING TEMPERATURE, SAID REDUCTION AND COOLING BEING CARRIED OUT WHILE MAINTAINING THE METAL PARTICLES IN THE PRESENCE OF EITHER THE SEPARATION MEDIUM OR A THERMAL DECOMPOSITION RESIDUE THEREOF.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |