US3305940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange between granular material and gas
Assignee: Individual
•
Filing: 1964-09-14
•
Granted: 1967-02-28
•
Expires: 1984-09-14
Abstract
No abstract record available.
Inventors
- 👤 Isler Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:50
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A HEAT EXCHANGER FOR THE HEAT EXCHANGE BETWEEN A GRANULAR MATERIAL AND A GAS COMPRISING AT LEAST ONE SUBSTANTIALLY CYLINDRICAL CONTAINER; AT LEAST ONE ADMISSION DUCT FOR SAID GAS OPENING INTO SAID CONTAINER AT ITS OUTER PERIPHERY SO AS TO INTRODUCE THE GAS INTO SAID CONTAINER WITH ROTARY MOTION ABOUT THE CYLINDER AXIS; A GAS DISCHARGE DUCT ISSUING FROM THE CENTER OF SAID CONTAINER; MEANS FOR CIRCULATING SAID GAS FROM SAID GAS ADMISSION DUCT THROUGH SAID CONTAINER TO SAID GAS DISCHARGE DUCT; A FEED DEVICE FOR THE GRANULAR MATERIAL TO BE BROUGHT INTO HEAT EXCHANGE WITH THE GAS, ARRANGED RADIALLY INWARD OF SAID GAS ADMISSION DUCT SO AS TO ADMIX SAID
Claim 2
Dependent Claim
111 words
A HEAT EXCHANGER FOR THE HEAT EXCHANGE BETWEEN A GRANULAR MATERIAL AND A GAS COMPRISING AT LEAST ONE SUBSTANTIALLY CYLINDRICAL CONTAINER; AT LEAST ONE ADMISSION DUCT FOR SAID GAS OPENING INTO SAID CONTAINER AT ITS OUTER PERIPHERY SO AS TO INTRODUCE THE GAS INTO SAID CONTAINER WITH ROTARY MOTION ABOUT THE CYLINDER AXIS; A GAS DISCHARGE DUCT ISSUING FROM THE CENTER OF SAID CONTAINER; MEANS FOR CIRCULATING SAID GAS FROM SAID GAS ADMISSION DUCT THROUGH SAID CONTAINER TO SAID GAS DISCHARGE DUCT; A FEED DEVICE FOR THE GRANULAR MATERIAL TO BE BROUGHT INTO HEAT EXCHANGE WITH THE GAS, ARRANGED RADIALLY INWARD OF SAID GAS ADMISSION DUCT SO AS TO ADMIX SAID
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |