Patent US3684558A successfully refreshed from Google Patents.
US3684558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of enrobing powder particles
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1971-02-03
•
Granted: 1972-08-15
•
Expires: 1991-02-03
Abstract
Abstract DROPLETS OF AN AQUEOUS SOLUTION OR SLURRY CONTAINING A POTENTIALLY TACKY SUBSTANCE ARE SPRAYED OVER A POWDER BED OF A REFRACTORY MATERIAL PREHEATED TO ABOUT 200*C.700*C., WHILE PRECAUTIONS ARE TAKEN TO INSURE THAT THE DROPLETS DO NOT COMBINE. THE WATER IN THE DROPLETS THUS BOILS ON SAID POWDER BED, WITH THE RESULT THAT THE TACKY SUBSTANCE IN THE DROPLETS ENROBES PARTILCES OF POWDER WHILE THE WATER EVAPORATES. THE ENROBED PARTICLES GRADUALLY SOLIDIFY INTO POROUS GRAINS.
Inventors
- 👤 Kinjiro Fujii
- 👤 Akihiro Motoe
- 👤 Homuru Kasugai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:21
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |