US3300870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage pneumatic conveying drying equipment
Assignee: Mizusawa Industrial Chemicals Ltd
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Filing: 1964-03-23
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Granted: 1967-01-31
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Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Sugahara Yujiro
- 👤 Tsuchida Hiroshi
- 👤 Sato Kiyoshi
- 👤 Usui Koichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:53
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/10; F26B17/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
MULTISTAGE PNEUMATIC DRYING APPARATUS WHEREIN EACH STAGE COMPRISES A DRYING DUCT, MEANS FOR FEEDING GRANULES TO BE DRIED INTO THE DRYING DUCT, MEANS FOR SUPPLYING HOT AIR TO THE DRYING DUCT FOR DRYING GRANULES IN THE DUCT WHILST CARRYING THEM THERETHROUGH, AND A SEPARATOR AT THE DISCHARGE END OF THE DRYING AIR, WHEREIN CONDUITS ARE PROGRANULES FROM THE DRYING AIR WHEREIN CONDUITS ARE PROVIDED FOR LEADING THE AIR FROM THE SEPARATOR OF EACH STAGE EXCEPT THE FIRST STAGE BACK TO THE DRYING DUCT OF THE PRECEDING STAGE, THE AIR CONDUIT FROM THE SEPARATOR OF THE FIRST STAGE LEADING TO EXHAUST, WHEREIN MEANS ARE PROVIDED FOR FEEDING GRANULES DISCHARGED FROM THE SEPARATOR OF EACH STAGE EXCEPT THE LAST STAGE TO THE DRYING DUCT OF THE NEXT STAGE, MEANS FOR CRUSHING PARTLY DRIED GRANULES BEING PROVIDED AT A LOCATION BETWEEN THE SEPARATOR OF THE FIRST STAGE AND THE DRYING DUCT OF THE SECOND STAGE AND BEING FREE FROM THE INFLUENCE OF AN AIR STREAM, AND WHEREIN SWIRL GENERATING MEANS ARE PROVIDED FOR CAUSING SWIRLING OF AIR TO BE PASSED THROUGH THE FIRST DRYING DUCT, SAID SWIRL GENERATING MEANS BEING POSITIONED IN THE DRYING DUCT UPSTREAM OF THE MEANS FOR FEEDING WET GRANULES INTO THE FIRST DRYING DUCT.
Claim 2
Dependent Claim
205 words
MULTISTAGE PNEUMATIC DRYING APPARATUS WHEREIN EACH STAGE COMPRISES A DRYING DUCT, MEANS FOR FEEDING GRANULES TO BE DRIED INTO THE DRYING DUCT, MEANS FOR SUPPLYING HOT AIR TO THE DRYING DUCT FOR DRYING GRANULES IN THE DUCT WHILST CARRYING THEM THERETHROUGH, AND A SEPARATOR AT THE DISCHARGE END OF THE DRYING AIR, WHEREIN CONDUITS ARE PROGRANULES FROM THE DRYING AIR WHEREIN CONDUITS ARE PROVIDED FOR LEADING THE AIR FROM THE SEPARATOR OF EACH STAGE EXCEPT THE FIRST STAGE BACK TO THE DRYING DUCT OF THE PRECEDING STAGE, THE AIR CONDUIT FROM THE SEPARATOR OF THE FIRST STAGE LEADING TO EXHAUST, WHEREIN MEANS ARE PROVIDED FOR FEEDING GRANULES DISCHARGED FROM THE SEPARATOR OF EACH STAGE EXCEPT THE LAST STAGE TO THE DRYING DUCT OF THE NEXT STAGE, MEANS FOR CRUSHING PARTLY DRIED GRANULES BEING PROVIDED AT A LOCATION BETWEEN THE SEPARATOR OF THE FIRST STAGE AND THE DRYING DUCT OF THE SECOND STAGE AND BEING FREE FROM THE INFLUENCE OF AN AIR STREAM, AND WHEREIN SWIRL GENERATING MEANS ARE PROVIDED FOR CAUSING SWIRLING OF AIR TO BE PASSED THROUGH THE FIRST DRYING DUCT, SAID SWIRL GENERATING MEANS BEING POSITIONED IN THE DRYING DUCT UPSTREAM OF THE MEANS FOR FEEDING WET GRANULES INTO THE FIRST DRYING DUCT.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |