Patent US1984789A successfully refreshed from Google Patents.
US1984789A
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Suppression of froth or scum on liquids
Assignee: Standard Brands Inc
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Filing: 1932-12-07
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Granted: 1934-12-18
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Expires: 1952-12-07
Abstract
No abstract record available.
Inventors
- 👤 Everett John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:11
CPC Classifications
C; C13; C13B; C13B25/00; C13B25/02; B; B01; B01D; B01D19/00; B01D19/02; Y; Y10; Y10S; Y10S159/00; Y10S159/16
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) | 1937-12-17 | 1938-06-18 | 1938-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-17 | 1942-06-18 | 1942-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-17 | 1946-06-18 | 1946-12-18 | $7700.00 | Window Closed / Lapsed |