Patent US2616604A successfully refreshed from Google Patents.
US2616604A
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US
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Method for freezing and drying liquids and semisolids
Assignee: Individual
•
Filing: 1946-08-22
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Granted: 1952-11-04
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Expires: 1966-08-22
Abstract
No abstract record available.
Inventors
- 👤 Theodore R Folsom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:41
CPC Classifications
B; B01; B01D; B01D7/00; F; F26; F26B; F26B5/00; F26B5/04; F26B5/06
Claims Analysis
Total Claims: 0
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US2471035A
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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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |