US3025385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating apparatus of fluidized electro-conductive powder resistance
Assignee: TO A KAKO KK
•
Filing: 1959-10-19
•
Granted: 1962-03-13
•
Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 Tanaka Yukio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:55
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/60; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/42; C; C21; C21D; C21D1/00; C21D1/34; C21D1/40; C21D9/00; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/24; C23C8/26; F; F28; F28D; F28D13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A HEATING APPARATUS COMPRISING A CHAMBER HAVING A MICRO-POROUS BOTTOM WALL WITHIN, A BED OF ELECTROCONDUCTIVE POWDER PARTICLES SUPPORTED ON SAID MICROPOROUS BOTTOM WALL, MEANS FOR FLUIDIZING THE BED OF
Claim 2
Dependent Claim
30 words
A HEATING APPARATUS COMPRISING A CHAMBER HAVING A MICRO-POROUS BOTTOM WALL WITHIN, A BED OF ELECTROCONDUCTIVE POWDER PARTICLES SUPPORTED ON SAID MICROPOROUS BOTTOM WALL, MEANS FOR FLUIDIZING THE BED OF
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |