Patent US2038451A successfully refreshed from Google Patents.
US2038451A
Expired / Lapsed
US
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Device for aerating fermentation liquids
Assignee: Individual
•
Filing: 1935-04-05
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Granted: 1936-04-21
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Expires: 1955-04-05
Abstract
No abstract record available.
Inventors
- 👤 Schattaneck Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:43
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/20; C12M29/00; C12M29/04; C12M29/06; Y; Y10; Y10S; Y10S435/00; Y10S435/818
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) | 1939-04-21 | 1939-10-21 | 1940-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-21 | 1943-10-21 | 1944-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-21 | 1947-10-21 | 1948-04-21 | $7700.00 | Window Closed / Lapsed |