Patent US2357048A successfully refreshed from Google Patents.
Patent US2819478A successfully refreshed from Google Patents.
US2819478A
Expired / Lapsed
US
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Convertible carpet scrubbing or floor polishing machine
Assignee: Hoover Co
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Filing: 1954-01-05
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Granted: 1958-01-14
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Expires: 1974-01-05
Abstract
No abstract record available.
Inventors
- 👤 Otis B Sutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:51
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4077; A47L11/02; A47L11/10; A47L11/14; A47L11/16; A47L11/164; A47L11/32; A47L11/325; A47L11/4036; A47L11/4038; A47L11/4063; A47L11/4069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |