US3086823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for charging cupolas
Assignee: Roxy Rexroth and Stadtler KG
•
Filing: 1961-01-11
•
Granted: 1963-04-23
•
Expires: 1981-01-11
Abstract
No abstract record available.
Inventors
- 👤 Rexroth Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:41
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/18; F; F27; F27B; F27B1/00; F27B1/10; F27B1/20; F27D; F27D3/00; F27D3/0024; F27D3/0033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN AN APPARATUS FOR SHOOTING MATERIAL INTO A CUPOLA MELTING ZONE, THE COMBINATION OF A BODY MEMBER HAVING A BORE THERETHROUGH DEFINING AN INJECTION CHAMBER HAVING A DISCHARGE END, A CHARGING COMMUNICATING WITH SAID INJECTION CHAMBER FOR SUPPLYING MATERIAL THERETO, A CLOSED CYLINDER HAVING AN OPENING IN ONE END WITH SAID OPENING COMMUNICATING WITH SAID INJECTION CHAMBERS, MEANS COMMUNICATING WITH A WALL OF SAID CLOSED CYLINDER AND CONNECTED TO A SOURCE OF AIR PRESSURE, A CHECK VALVE ON THE WALL OF SAID CLOSED CYLINDER TO CLOSE
Claim 2
Dependent Claim
86 words
IN AN APPARATUS FOR SHOOTING MATERIAL INTO A CUPOLA MELTING ZONE, THE COMBINATION OF A BODY MEMBER HAVING A BORE THERETHROUGH DEFINING AN INJECTION CHAMBER HAVING A DISCHARGE END, A CHARGING COMMUNICATING WITH SAID INJECTION CHAMBER FOR SUPPLYING MATERIAL THERETO, A CLOSED CYLINDER HAVING AN OPENING IN ONE END WITH SAID OPENING COMMUNICATING WITH SAID INJECTION CHAMBERS, MEANS COMMUNICATING WITH A WALL OF SAID CLOSED CYLINDER AND CONNECTED TO A SOURCE OF AIR PRESSURE, A CHECK VALVE ON THE WALL OF SAID CLOSED CYLINDER TO CLOSE
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |