Patent US2152956A successfully refreshed from Google Patents.
US2152956A
Expired / Lapsed
US
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Mixing system
Assignee: Individual
•
Filing: 1938-01-07
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Granted: 1939-04-04
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Expires: 1958-01-07
Abstract
No abstract record available.
Inventors
- 👤 Etzkorn Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:02
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/40; B01F23/45; B01F23/452; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0352; Y10T137/0363; Y10T137/2496; Y10T137/2499; Y10T137/2514; Y10T137/4673; Y10T137/469; Y10T137/474; Y10T137/6416; Y10T137/6579; Y10T137/6851; Y10T137/7036; Y10T137/8593; Y10T137/86187; Y10T137/86212
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) | 1942-04-03 | 1942-10-03 | 1943-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-03 | 1946-10-03 | 1947-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-03 | 1950-10-03 | 1951-04-04 | $7700.00 | Window Closed / Lapsed |