US3233334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash drying apparatus and method utilizing intermittent pulses of drying gas
Assignee: Pennwalt Corp
•
Filing: 1962-09-28
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Granted: 1966-02-08
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Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 William H Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:49
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/30; F26B21/35; A; A23; A23B; A23B4/00; A23B4/03; A23B4/037; A23B7/00; A23B7/02; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/12; A23L2/14; F26B5/00; F26B5/04; F26B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF DRYING A FROZEN PRODUCT COMPRISING INTRODUCING A PRODUCT INTO A CHAMBER, HEATING THE PRODUCT BY INTRODUCING A HEATED GAS INTO SAID CHAMBER CLOSED TO EXIT OF A GAS UNTIL THE PRODUCT REACHES A PREDETERMINED HIGH TEMPERATURE, FLASHING OFF MOISTUREFROM THE PRODUCT BY REDUCING THE PRESSURE IN THE CHAMBER TO ABOUT 5-50 MILLIMETERS OF MERCURY AND UNTIL THE TEMPERATURE OF THE PRODUCT REACHES A PREDETERMINED LOW TEMPERATURE, THEN REPEATING SAID STEPS OF HEATING AND FLASHING IN THAT ORDER UNTIL THE PRODUCT CONTAINS A PREDETERMINED AMOUNT OF RESIDUAL MOISTURE.
Claim 2
Independent Claim
90 words
A METHOD OF DRYING A FROZEN PRODUCT COMPRISING INTRODUCING A PRODUCT INTO A CHAMBER, HEATING THE PRODUCT BY INTRODUCING A HEATED GAS INTO SAID CHAMBER CLOSED TO EXIT OF A GAS UNTIL THE PRODUCT REACHES A PREDETERMINED HIGH TEMPERATURE, FLASHING OFF MOISTUREFROM THE PRODUCT BY REDUCING THE PRESSURE IN THE CHAMBER TO ABOUT 5-50 MILLIMETERS OF MERCURY AND UNTIL THE TEMPERATURE OF THE PRODUCT REACHES A PREDETERMINED LOW TEMPERATURE, THEN REPEATING SAID STEPS OF HEATING AND FLASHING IN THAT ORDER UNTIL THE PRODUCT CONTAINS A PREDETERMINED AMOUNT OF RESIDUAL MOISTURE.
References Cited (Backward Citations)
US1050151A
Cited
US942150A
Cited
US1866346A
Cited
US2023536A
Cited
US2344754A
Cited
US2435503A
Cited
US2586818A
Cited
US2994132A
Cited
US3020645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |