US2421235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct drive vacuum cleaner agitator roller
Assignee: Individual
•
Filing: 1944-02-10
•
Granted: 1947-05-27
•
Expires: 1964-02-10
Abstract
No abstract record available.
Inventors
- 👤 Elmer A Basinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:18
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/04; A47L9/0405; A47L9/0411
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US413387A
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US1324195A
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US715408A
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US1189216A
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US1611684A
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DE503630C
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US1914834A
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US1792188A
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US1953340A
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US1983566A
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US2323554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |