US2577834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for dewaxing and dehydrating refrigerants
Assignee: Individual
•
Filing: 1948-03-19
•
Granted: 1951-12-11
•
Expires: 1968-03-19
Abstract
No abstract record available.
Inventors
- 👤 Edward A Wenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:32
CPC Classifications
F; F25; F25B; F25B40/00; F25B43/00; F25B43/003; Y; Y10; Y10S; Y10S210/00; Y10S210/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2073863A
Cited
US2199258A
Cited
US2230892A
Cited
US2243949A
Cited
US2285123A
Cited
US2279928A
Cited
US2341430A
Cited
US2430692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |