Patent US2675273A successfully refreshed from Google Patents.
US2675273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room vacuum cleaning system with baseboard ducts
Assignee: Individual
•
Filing: 1950-10-27
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Granted: 1954-04-13
•
Expires: 1970-10-27
Abstract
No abstract record available.
Inventors
- 👤 Genevieve A Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:49
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1150950A
Cited
US1048477A
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US917701A
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US969157A
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US1029532A
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US1026406A
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US1764424A
Cited
FR730646A
Cited
US2483704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |