Patent US2014237A successfully refreshed from Google Patents.
Patent US3147331A successfully refreshed from Google Patents.
US3147331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric shaft furnace
Assignee: Evonik Operations GmbH
•
Filing: 1961-05-01
•
Granted: 1964-09-01
•
Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Brugger Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:41
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/02; F27D11/04; B; B01; B01J; B01J3/00; B01J3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
AN ELECTRICALLY HEATED SHAFT FURNACE FOR THE DIRECT HALOGENATION OF BRIQUETTED MATERIAL COMPRISING BRICK MEANS DEFINING A CENTRAL REACTION CHAMBER, A HOLLOW CARBON INSERT IN SAID CHAMBER DEFINING A SPACE AT THE INTERIOR THEREOF FOR SAID BRIQUETTED MATERIAL, A DOME CLOSING SAID REACTION CHAMBER, A CENTRAL HOLLOW ELECTRODE EXTENDING THROUGH SAID DOME AND INTO THE CENTER OF SAID CARBON INSERT, ELECTRICAL MEANS FOR ENERGIZING SAID CARBON INSERT AND SAID CENTRAL CARBON ELECTRODE, MEANS FOR DIRECTING A HALOGEN GAS THROUGH SAID ELECTRODE AND INTO SAID REACTION CHAMBER, AND MEANS FOR OSCILLATING SAID CENTRAL CARBON ELETRODE THROUGH A VERTICAL UP AND DOWN MOVEMENT DURING THE REACTION IN THE REACTION CHAMBER
Claim 2
Dependent Claim
108 words
AN ELECTRICALLY HEATED SHAFT FURNACE FOR THE DIRECT HALOGENATION OF BRIQUETTED MATERIAL COMPRISING BRICK MEANS DEFINING A CENTRAL REACTION CHAMBER, A HOLLOW CARBON INSERT IN SAID CHAMBER DEFINING A SPACE AT THE INTERIOR THEREOF FOR SAID BRIQUETTED MATERIAL, A DOME CLOSING SAID REACTION CHAMBER, A CENTRAL HOLLOW ELECTRODE EXTENDING THROUGH SAID DOME AND INTO THE CENTER OF SAID CARBON INSERT, ELECTRICAL MEANS FOR ENERGIZING SAID CARBON INSERT AND SAID CENTRAL CARBON ELECTRODE, MEANS FOR DIRECTING A HALOGEN GAS THROUGH SAID ELECTRODE AND INTO SAID REACTION CHAMBER, AND MEANS FOR OSCILLATING SAID CENTRAL CARBON ELETRODE THROUGH A VERTICAL UP AND DOWN MOVEMENT DURING THE REACTION IN THE REACTION CHAMBER
References Cited (Backward Citations)
US1129512A
Cited
US1463970A
Cited
US1562684A
Cited
US1756457A
Cited
US1984809A
Cited
US2378675A
Cited
US2755325A
Cited
US2912476A
Cited
US2931705A
Cited
US3053975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |