US2476537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction cleaner and rotary agitator therefor
Assignee: Individual
•
Filing: 1943-12-17
•
Granted: 1949-07-19
•
Expires: 1963-12-17
Abstract
No abstract record available.
Inventors
- 👤 Carl E Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:20
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)
US1614708A
Cited
US1799808A
Cited
US1775186A
Cited
US1642440A
Cited
DE495381C
Cited
GB391597A
Cited
US1919067A
Cited
US2244077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |