US2327181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: ELECTRIC VACUUM CLEANER CO
•
Filing: 1940-04-30
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Granted: 1943-08-17
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Expires: 1960-04-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Dunbar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:20
CPC Classifications
A; A47; A47L; A47L7/00; A47L7/0004; A47L7/0023; A47L7/0038; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/365; A47L7/0042; A47L9/00; A47L9/10; A47L9/19
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) | 1946-08-16 | 1947-02-15 | 1947-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-16 | 1951-02-15 | 1951-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-16 | 1955-02-15 | 1955-08-17 | $7700.00 | Window Closed / Lapsed |