US2533169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary vacuum cleaner brush
Assignee: Scott Fetzer Co
•
Filing: 1949-01-22
•
Granted: 1950-12-05
•
Expires: 1969-01-22
Abstract
No abstract record available.
Inventors
- 👤 Charles H Macfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:45
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/04; A47L9/0461; A47L9/0466; A47L9/0477
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1141863A
Cited
US1749744A
Cited
US2271545A
Cited
US2261781A
Cited
US2297366A
Cited
US2261768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |