Patent US1838374A successfully refreshed from Google Patents.
US1838374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrator having various intermittent voltages
Assignee: PETROLEUM RECTIFYING Co
•
Filing: 1927-02-07
•
Granted: 1931-12-29
•
Expires: 1947-02-07
Abstract
No abstract record available.
Inventors
- 👤 William O Eddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:52
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/02
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) | 1934-12-28 | 1935-06-29 | 1935-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-12-28 | 1939-06-29 | 1939-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-12-28 | 1943-06-29 | 1943-12-29 | $7700.00 | Window Closed / Lapsed |