Patent US2750328A successfully refreshed from Google Patents.
US2750328A
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Aerating method and apparatus
Assignee: NAT DAIRY RES LAB Inc
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Filing: 1952-03-20
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Granted: 1956-06-12
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Expires: 1972-03-20
Abstract
No abstract record available.
Inventors
- 👤 Edwin G Stimpson
- 👤 Henning A Trebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
C; C12; C12M; C12M27/00; C12M27/02; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/233; B01F23/2334; B01F23/23342; C12M27/18; C12M27/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A FERMENTOR COMPRISING A CONTAINER OF NUTRIENT SOLUTION, AN OPEN-ENDED VERTICAL TUBE CENTRALLY LOCATED IN SAID CONTAINER WITH ITS LOWER END ADJACENT THE BOTTOM OF SAID CONTAINER AND ITS UPPER END BELOW THE TOP OF SAID CONTAINER, AN AIR INLET IN THE BOTTOM OF SAID CONTAINER OPPOSITE THE LOWER END OF SAID TUBE, A HORIZONTAL PLATE HAVING A DIAMETER GREATER THAN SAID TUBE BETWEEN SAID AIR INLET AND SAID TUBE TO PREVENT ESCAPE OF AIR THROUGH SAID TUBE, AND ROTATABLE IMPELLER BLADES BETWEEN SAID PLATE AND SAND TUBE FOR DRAWING SOLUTION DOWN SAID TUBE AND DISPERSING AIR THROUGHOUT THE SOLUTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |