US2155960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scum remover
Assignee: Individual
•
Filing: 1937-05-11
•
Granted: 1939-04-25
•
Expires: 1957-05-11
Abstract
No abstract record available.
Inventors
- 👤 Howard S Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:11
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012; B01D21/009; B01D21/10; B01D21/12; B01D21/24; B01D21/2433
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) | 1942-04-24 | 1942-10-24 | 1943-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-24 | 1946-10-24 | 1947-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-24 | 1950-10-24 | 1951-04-25 | $7700.00 | Window Closed / Lapsed |