US1389101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam or froth dissipator
Assignee: Individual
•
Filing: 1918-08-05
•
Granted: 1921-08-30
•
Expires: 1938-08-05
Abstract
No abstract record available.
Inventors
- 👤 Ohrvall Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/0042; B01D19/0047
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) | 1924-08-29 | 1925-02-28 | 1925-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-08-29 | 1929-02-28 | 1929-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-08-29 | 1933-02-28 | 1933-08-30 | $7700.00 | Window Closed / Lapsed |