US2887390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for spray drying
Assignee: University of Minnesota Twin Cities
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Filing: 1953-07-13
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Granted: 1959-05-19
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Expires: 1973-07-13
Abstract
No abstract record available.
Inventors
- 👤 Samuel T Coulter
- 👤 Verne H Townley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:33
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/16; B01D1/18; A; A23; A23B; A23B2/00; A23B2/90; A23B2/93; A23B5/00; A23B5/02; A23B5/035; A23B7/00; A23B7/02; A23B7/026; A23C; A23C1/00; A23C1/04; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE PROCESS OF SPRAY DRYING WHICH COMPRISES THE STEPS OF FORCING A STREAM OF A DRYING GAS THROUGH A DRYING APPARATUS AT AN INITIAL TEMPERATURE OF FROM ABOUT 250 TO 1500* F. AND AT AN INITIAL VELOCITY OF AT LEAST ABOUT 100 FEET PER SECOND, INCREASING THE VELOCITY OF SAID DRYING GAS TO AT LEAST ABOUT 450 FEET PER SECOND, INTRODUCING A STREAM OF THE LIQUID CONTAINING THE SOLIDS TO BE DRIED INTO THE DRYING GAS AT A POINT OF INCREASED VELOCITY IN THE DIRECTION OF FLOW OF THE DRYING GAS, DECREASING THE VELOCITY OF THE COMBINED STREAM OF HOT DRYING GAS AND SAID LIQUID WHEREBY THE SOLIDS ARE DRIED AND SEPARATING THE DRIED SOLIDS FROM THE GAS.
Claim 2
Dependent Claim
9 words
THE PRODUCT PRODUCED BY THE PROCESS OF CLAIM 9.
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) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |