US2325657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined filter, dehydrator, and indicator
Assignee: Individual
•
Filing: 1940-05-13
•
Granted: 1943-08-03
•
Expires: 1960-05-13
Abstract
No abstract record available.
Inventors
- 👤 Neal B Burkness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/003; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; Y; Y10; Y10S; Y10S116/00; Y10S116/42; Y10S210/00; Y10S210/06
Claims Analysis
Total Claims: 0
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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) | 1946-08-02 | 1947-02-01 | 1947-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-02 | 1951-02-01 | 1951-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-02 | 1955-02-01 | 1955-08-03 | $7700.00 | Window Closed / Lapsed |