US1745248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-treating apparatus
Assignee: Individual
•
Filing: 1928-04-30
•
Granted: 1930-01-28
•
Expires: 1948-04-30
Abstract
No abstract record available.
Inventors
- 👤 Guenther Edward J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:10
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/06; B03; B03C; B03C1/00; B03C1/02; B03C1/28; B03C2201/00; B03C2201/18
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) | 1933-01-27 | 1933-07-29 | 1934-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-01-27 | 1937-07-29 | 1938-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-01-27 | 1941-07-29 | 1942-01-28 | $7700.00 | Window Closed / Lapsed |