US2433592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration method and machine
Assignee: Individual
•
Filing: 1945-05-09
•
Granted: 1947-12-30
•
Expires: 1965-05-09
Abstract
No abstract record available.
Inventors
- 👤 Lionel E Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:08
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B03D1/1412; B03D1/1493; B03D1/20; B03D1/24; B03D1/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US31806A
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US1247655A
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US1737623A
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DE505793C
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US2054249A
Cited
US2141186A
Cited
US2165889A
Cited
US2148446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |