Patent US2789660A successfully refreshed from Google Patents.
US2789660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic vacuum cleaners
Assignee: Electrolux Corp
•
Filing: 1954-05-12
•
Granted: 1957-04-23
•
Expires: 1974-05-12
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:58
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2836; A47L9/2842; A47L9/0072; A47L9/2805; A47L9/2821
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1904973A
Cited
US2270318A
Cited
US2410293A
Cited
US2520589A
Cited
US2580643A
Cited
US2626012A
Cited
US2621756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |