US2728995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying granular material
Assignee: Ruhrchemie AG
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Filing: 1952-07-29
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Granted: 1956-01-03
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Expires: 1972-07-29
Abstract
No abstract record available.
Inventors
- 👤 Schaub Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:09
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/10; F26B17/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A DEVICE FOR THE DRYING OF PULVERULENT AND GRANULAR MATERIALS CAPABLE OF BEING PILED, WHICH COMPRISES MEANS DEFINING A VERTICAL, SUBSTANTIALLY ENCLOSED VESSEL, GAS INLET MEANS POSITIONED AT THE LOWER PORTION OF SAID VESSEL, GAS OUTLET MEANS POSITIONED AT THE UPPER PORTION OF SAID VESSEL, A MATERIAL FEED PIPE, EXTENDING THROUGH THE TOP OF SAID VESSEL AND TERMINATING AT A SUFFICIENT HEIGHT ABOVE THE BOTTOM OF THE VESSEL TO ALLOW A VERTICAL, CONICAL PILE OF GRANULAR MATERIAL TO BE MAINTAINED THEREBETWEEN, AND A MULTIPLE NUMBER OF SUPERIMPOSED ANNULAR PLATES, EACH PLATE DEFINING A GAS PASSAGE OPENING THERETHROUGH, THE GAS PASSAGE OPENING ON EACH PLATE BEING DEFINED IN A POSITION STAGGERED WITH RESPECT TO THE POSITION OF THE GAS PASSAGE OPENING DEFINED ON THE NEXT SUCCESSIVE PLATE.
Claim 2
Independent Claim
126 words
A DEVICE FOR THE DRYING OF PULVERULENT AND GRANULAR MATERIALS CAPABLE OF BEING PILED, WHICH COMPRISES MEANS DEFINING A VERTICAL, SUBSTANTIALLY ENCLOSED VESSEL, GAS INLET MEANS POSITIONED AT THE LOWER PORTION OF SAID VESSEL, GAS OUTLET MEANS POSITIONED AT THE UPPER PORTION OF SAID VESSEL, A MATERIAL FEED PIPE, EXTENDING THROUGH THE TOP OF SAID VESSEL AND TERMINATING AT A SUFFICIENT HEIGHT ABOVE THE BOTTOM OF THE VESSEL TO ALLOW A VERTICAL, CONICAL PILE OF GRANULAR MATERIAL TO BE MAINTAINED THEREBETWEEN, AND A MULTIPLE NUMBER OF SUPERIMPOSED ANNULAR PLATES, EACH PLATE DEFINING A GAS PASSAGE OPENING THERETHROUGH, THE GAS PASSAGE OPENING ON EACH PLATE BEING DEFINED IN A POSITION STAGGERED WITH RESPECT TO THE POSITION OF THE GAS PASSAGE OPENING DEFINED ON THE NEXT SUCCESSIVE PLATE.
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |