US1730581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil purifier
Assignee: Individual
•
Filing: 1928-11-15
•
Granted: 1929-10-08
•
Expires: 1948-11-15
Abstract
No abstract record available.
Inventors
- 👤 William H Mcmachen
- 👤 Marion F Mcmachen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:38
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/10; B; B01; B01D; B01D24/00; B01D24/007; B01D24/008; B01D24/02; B01D24/04; B01D24/042; C11B3/008
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) | 1932-10-07 | 1933-04-08 | 1933-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-07 | 1937-04-08 | 1937-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-07 | 1941-04-08 | 1941-10-08 | $7700.00 | Window Closed / Lapsed |