US2811738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiator tool and brush combinations for vacuum cleaners
Assignee: Singer Co
•
Filing: 1953-12-16
•
Granted: 1957-11-05
•
Expires: 1973-12-16
Abstract
No abstract record available.
Inventors
- 👤 Francis A Gall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:51
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/06; A47L9/0693
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189701046A
Cited
US1053665A
Cited
DE540869C
Cited
GB502239A
Cited
US2243120A
Cited
US2206738A
Cited
GB625072A
Cited
US2659924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |