US3264747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for continuous freeze drying
Assignee: Pennwalt Corp
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Filing: 1964-05-13
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Granted: 1966-08-09
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Expires: 1984-05-13
Abstract
No abstract record available.
Inventors
- 👤 Fuentevilla Manuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:17
CPC Classifications
F; F26; F26B; F26B3/00; F26B3/32; F26B3/34; A; A23; A23B; A23B2/00; A23B2/90; A23B2/92; A23B7/00; A23B7/02; A23B7/024; A23C; A23C1/00; A23C1/06; A23C1/08; F26B5/00; F26B5/04; F26B5/041; F26B5/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
A METHOD OF DYRING FROZEN MATERIAL COMPRISING THE STEPS OF INTRODUCING THE FROZEN MATERIAL TO BE DRIED TO A ZONE OF SUB-ATMOSPHERIC PRESSURE, RAISING THE TEMPERATURE OF SAID MATERIAL, VIBRATING SAID MATERIAL, MOVING THE MATERIAL PAST A SOURCE OF MICROWAVE HEAT, AND REMOVING THE MATERIAL FROM THE ZONE.
References Cited (Backward Citations)
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US1632180A
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US2373374A
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US2751687A
Cited
US3020645A
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US3178829A
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |