Patent US2072691A successfully refreshed from Google Patents.
US2072691A
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US
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Aerating apparatus
Assignee: Hobart Manfacturing Co
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Filing: 1933-12-26
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Granted: 1937-03-02
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Expires: 1953-12-26
Abstract
No abstract record available.
Inventors
- 👤 Rawson E Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:06
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/80; B01F27/95; A; A47; A47J; A47J43/00; A47J43/12; A47J43/127; B01F23/00; B01F23/20; B01F23/23; B01F23/235; B01F23/2351; B01F27/55; B01F27/96
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) | 1940-03-01 | 1940-08-31 | 1941-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-01 | 1944-08-31 | 1945-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-01 | 1948-08-31 | 1949-03-02 | $7700.00 | Window Closed / Lapsed |