Patent US2503568A successfully refreshed from Google Patents.
US2503568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: TIMM AIRCRAFT Corp
•
Filing: 1944-09-25
•
Granted: 1950-04-11
•
Expires: 1964-09-25
Abstract
No abstract record available.
Inventors
- 👤 Otto W Timm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:52
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/20; 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)
US1316442A
Cited
US783301A
Cited
US832450A
Cited
US946535A
Cited
US1076289A
Cited
US1100575A
Cited
US1356086A
Cited
US1528877A
Cited
US1939705A
Cited
US1997720A
Cited
US2094775A
Cited
US2201229A
Cited
US2246862A
Cited
US2247868A
Cited
US2318395A
Cited
US2306212A
Cited
US2372944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |