Patent US3674557A successfully refreshed from Google Patents.
US3674557A
Expired / Lapsed
US
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Method for drying sugar solutions
Assignee: WR Grace and Co
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Filing: 1971-05-03
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Granted: 1972-07-04
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Expires: 1991-05-03
Abstract
Abstract IN A PROCESS FOR PREPARING DRIED, SOLID, SUCROSE-CONTAINING PRODUCTS FROM SUCROSE-CONTAINING SOLUTIONS BY DRYING DROPLETS OF THE SAID SOLUTION IN A CURRENT OF HEATED AIR AND IN THE PRESENCE OF SEPARATELY INTRODUCED RECYCLED DRIED PRODUCT SOLIDS, THE IMPROVEMENT COMPRISING MAINTAINING THE INLET TEMPERATURE OF THE HEATED AIR IN THE RANGE OF FROM 400* TO 500* FABRENHEIT AND THE AVENGE AIR RESIDENCE TIME IN THE DRYING ZONE IN THE RANGE OF 2 TO 60 SECONDS.
Inventors
- 👤 Roland H Gray Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:47
CPC Classifications
C; C13; C13B; C13B30/00; C13B30/02; C13B30/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |