US2414940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the drying of liquid-containing biological materials by freezing and sublimating under low pressure in the presence of a chemical desiccant
Assignee: Tabor Olney Corp
•
Filing: 1940-02-08
•
Granted: 1947-01-28
•
Expires: 1960-02-08
Abstract
No abstract record available.
Inventors
- 👤 Earl W Flosdorf
- 👤 Jr Francis Joseph Stokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/90; A23B2/92; F; F26; F26B; F26B5/00; F26B5/04; F26B5/06; Y; Y10; Y10S; Y10S159/00; Y10S159/05
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1950-01-27 | 1950-07-29 | 1951-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-01-27 | 1954-07-29 | 1955-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-01-27 | 1958-07-29 | 1959-01-28 | $7700.00 | Window Closed / Lapsed |