Patent US2468128A successfully refreshed from Google Patents.
US2468128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction cleaner and fan therefor
Assignee: BIRTMAN ELECTRIC Co
•
Filing: 1944-10-12
•
Granted: 1949-04-26
•
Expires: 1964-10-12
Abstract
No abstract record available.
Inventors
- 👤 Charles H Sparklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:26
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/24; A47L5/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE309632C
Cited
CH94086A
Cited
GB246659A
Cited
US1914834A
Cited
FR676564A
Cited
US1857965A
Cited
US1878858A
Cited
US2058371A
Cited
US2187164A
Cited
US2069640A
Cited
US2116233A
Cited
US2157609A
Cited
US2307283A
Cited
USRE22336E
Cited
US2322302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |