US3203681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heat treatment of powdered raw meterial
Assignee: Individual
•
Filing: 1963-12-13
•
Granted: 1965-08-31
•
Expires: 1983-12-13
Abstract
No abstract record available.
Inventors
- 👤 Rosa Josef
- 👤 Petr Vlastimil
- 👤 Seckar Jiri
- 👤 Koupil Zdenek
- 👤 Novak Jaroslav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:36
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/43; C04B7/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN AN APPARATUS FOR HEAT TREATING A PULVERULENT MATERIAL, IN COMBINATION: (A) PREHEATING MEAMS FOR PREHEATING SAID PULVERULENT MATERIAL; (B) AN UPRIGHT COLUMN, SAID PREHEATING MEANS COMMUNICATING WITH A BOTTOM PORTION OF SAID COLUMN FOR PASSAGE OF THE PREHEATED MATERIAL INTO SAID COLUMN; (C) A COMBUSTION CHAMBER COMMUNICATING WITH SAID BOTTOM PORTION; (D) BURNER MEANS IN SAID CHAMBER FOR BURNING A FUEL TO A HOT COMBUSTION GAS, WHEREBY SAIDGAS PASSES UPWARD THROUGH SAID COLUMN, ENTRAINS THE PREHEATED MATERIAL, AND BURNS THE ENTRAINED MATERIAL WHILE BEING COOLED THEREBY, SAID BURNER MEANS AND SAID COMBUSTION CHAMBER CONSTITUTING FIRST HEATING MEANS;
Claim 2
Dependent Claim
98 words
IN AN APPARATUS FOR HEAT TREATING A PULVERULENT MATERIAL, IN COMBINATION: (A) PREHEATING MEAMS FOR PREHEATING SAID PULVERULENT MATERIAL; (B) AN UPRIGHT COLUMN, SAID PREHEATING MEANS COMMUNICATING WITH A BOTTOM PORTION OF SAID COLUMN FOR PASSAGE OF THE PREHEATED MATERIAL INTO SAID COLUMN; (C) A COMBUSTION CHAMBER COMMUNICATING WITH SAID BOTTOM PORTION; (D) BURNER MEANS IN SAID CHAMBER FOR BURNING A FUEL TO A HOT COMBUSTION GAS, WHEREBY SAIDGAS PASSES UPWARD THROUGH SAID COLUMN, ENTRAINS THE PREHEATED MATERIAL, AND BURNS THE ENTRAINED MATERIAL WHILE BEING COOLED THEREBY, SAID BURNER MEANS AND SAID COMBUSTION CHAMBER CONSTITUTING FIRST HEATING MEANS;
References Cited (Backward Citations)
US2757921A
Cited
US2860174A
Cited
US3013786A
Cited
US2797077A
Cited
US2965366A
Cited
US2991062A
Cited
FR1240786A
Cited
US3037940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |