US2573091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined vacuum cleaner and tool casing
Assignee: Individual
•
Filing: 1946-03-29
•
Granted: 1951-10-30
•
Expires: 1966-03-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles Kepler Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:04
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/0009; A47L9/0018; A47L9/0027
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE634049C
Cited
US844481A
Cited
FR621813A
Cited
US1884866A
Cited
US2042387A
Cited
US2248585A
Cited
US2321222A
Cited
US2337364A
Cited
US2355034A
Cited
US2394271A
Cited
DK61996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |