Patent US2619133A successfully refreshed from Google Patents.
Patent US2156845A successfully refreshed from Google Patents.
US2156845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for drying substances in vacuo
Assignee: Individual
•
Filing: 1938-03-22
•
Granted: 1939-05-02
•
Expires: 1958-03-22
Abstract
No abstract record available.
Inventors
- 👤 Johan Georg Wilhelm Gentele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:40
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/044; A; A23; A23C; A23C1/00; A23C1/01; F26B3/00; F26B3/28; Y; Y10; Y10S; Y10S159/00; Y10S159/06
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) | 1942-05-01 | 1942-10-31 | 1943-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-01 | 1946-10-31 | 1947-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-01 | 1950-10-31 | 1951-05-02 | $7700.00 | Window Closed / Lapsed |