Patent US2658224A successfully refreshed from Google Patents.
US2658224A
Expired / Lapsed
US
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Vacuum cleaner cart
Assignee: Individual
•
Filing: 1949-11-30
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Granted: 1953-11-10
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Expires: 1969-11-30
Abstract
No abstract record available.
Inventors
- 👤 Roland K Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:03
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/009; B; B62; B62B; B62B3/00; B62B2202/00; B62B2202/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US368720A
Cited
US1571659A
Cited
GB299952A
Cited
US2042387A
Cited
US2177153A
Cited
US2491680A
Cited
US2534122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |