Patent US4133511A successfully refreshed from Google Patents.
Patent US3136836A successfully refreshed from Google Patents.
US3136836A
Expired / Lapsed
US
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Fluid powder electric furnace
Assignee: Kokusai Denki Electric Inc
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Filing: 1961-12-06
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Granted: 1964-06-09
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Expires: 1981-12-06
Abstract
No abstract record available.
Inventors
- 👤 Tanaka Yukio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:44
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A FURNACE COMPRISING, MEANS DEFINING A CHAMBER, A HEAT-RESISTANT GAS-PERVIOUS SUPPORT IN SAID CHAMBER, A BED OF CARBON MASSES ON SAID SUPPORT, CARBON PARTICLES DISPERSED ON SAID BED OF CARBON MASSES, MEANS TO SUPPLY A GAS COMPRISING OXYGEN UNDER PRESSURE THROUGH SAID GAS-PERVIOUS SUPPORT TO SUSPEND THE CRBON PARTICLES IN SAID CHAMBER ABOVE SAID CARBON MASSES, MEANS TO FLOW
Claim 2
Dependent Claim
59 words
A FURNACE COMPRISING, MEANS DEFINING A CHAMBER, A HEAT-RESISTANT GAS-PERVIOUS SUPPORT IN SAID CHAMBER, A BED OF CARBON MASSES ON SAID SUPPORT, CARBON PARTICLES DISPERSED ON SAID BED OF CARBON MASSES, MEANS TO SUPPLY A GAS COMPRISING OXYGEN UNDER PRESSURE THROUGH SAID GAS-PERVIOUS SUPPORT TO SUSPEND THE CRBON PARTICLES IN SAID CHAMBER ABOVE SAID CARBON MASSES, MEANS TO FLOW
References Cited (Backward Citations)
US1415446A
Cited
US3025385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |