US3403211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and devices for heating substances
Assignee: Centre National de la Recherche Scientifique
•
Filing: 1966-08-15
•
Granted: 1968-09-24
•
Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Foex Marc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:25
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A FURNACE FOR TREATING MATERIALS AT HIGH TEMPERATURES, COMPRISING A ROTATABLE HEATING CHAMBER HAVING A CENTRAL MATERIAL RECEIVING REGION AND AN INLET OPENING DISPOSED IN ONE END OF SAID CHAMBER THROUGH WHICH SAID CENTRAL REGION COMMUNICATES WITH THE REGION OUTSIDE SAID CHAMBER, A PRINCIPAL PLASMA BLOWPIPE DISPOSED IN PROXIMITY TO SAID INLET OPENING, A SECOND OPENING DISPOSED IN THE END OF SAID CHAMBER WHICH IS OPPOSITE THE END CONTAINING SAID INLET OPENING, AN AUXILIARY BLOWPIPE DISPOSED IN PROXIMITY TO SAID SECOND OPENING, AND ELECTRICAL POWER MEANS CONNECTED TO SAID APPARATUS TO MAINTAIN A CURRENT ARC BETWEEN SAID PRINCIPAL BLOWPIPE AND THE JET PRODUCED BY SAID AUXILIARY BLOWPIPE.
Claim 2
Dependent Claim
107 words
A FURNACE FOR TREATING MATERIALS AT HIGH TEMPERATURES, COMPRISING A ROTATABLE HEATING CHAMBER HAVING A CENTRAL MATERIAL RECEIVING REGION AND AN INLET OPENING DISPOSED IN ONE END OF SAID CHAMBER THROUGH WHICH SAID CENTRAL REGION COMMUNICATES WITH THE REGION OUTSIDE SAID CHAMBER, A PRINCIPAL PLASMA BLOWPIPE DISPOSED IN PROXIMITY TO SAID INLET OPENING, A SECOND OPENING DISPOSED IN THE END OF SAID CHAMBER WHICH IS OPPOSITE THE END CONTAINING SAID INLET OPENING, AN AUXILIARY BLOWPIPE DISPOSED IN PROXIMITY TO SAID SECOND OPENING, AND ELECTRICAL POWER MEANS CONNECTED TO SAID APPARATUS TO MAINTAIN A CURRENT ARC BETWEEN SAID PRINCIPAL BLOWPIPE AND THE JET PRODUCED BY SAID AUXILIARY BLOWPIPE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |