US2151963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of eliminating foam and froth from the surfaces of fluids and semifluids
Assignee: Individual
•
Filing: 1934-11-12
•
Granted: 1939-03-28
•
Expires: 1954-11-12
Abstract
No abstract record available.
Inventors
- 👤 Fladmark Erling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:18
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/02; D21H23/00; D21H23/02; D21H23/22; D21H23/70; D21H23/72; D21H21/00; D21H21/06; D21H21/12; D21H23/32; D21H23/42; D21H23/52; D21H23/56
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) | 1942-03-27 | 1942-09-26 | 1943-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-27 | 1946-09-26 | 1947-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-27 | 1950-09-26 | 1951-03-28 | $7700.00 | Window Closed / Lapsed |