Patent US3056938A successfully refreshed from Google Patents.
US2247121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: ELECTRIC VACUUM CLEANER Co Inc
•
Filing: 1939-12-28
•
Granted: 1941-06-24
•
Expires: 1959-12-28
Abstract
No abstract record available.
Inventors
- 👤 Foldes Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:41
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/362
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-06-23 | 1944-12-23 | 1945-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-23 | 1948-12-23 | 1949-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-23 | 1952-12-23 | 1953-06-24 | $7700.00 | Window Closed / Lapsed |