US2743787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air supported cleaner with diffuser
Assignee: Hoover Co
•
Filing: 1954-04-07
•
Granted: 1956-05-01
•
Expires: 1974-04-07
Abstract
No abstract record available.
Inventors
- 👤 Werner G Seck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
A; A47; A47L; A47L7/00; A47L7/04; A47L7/06; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/365; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE524095C
Cited
US978916A
Cited
US1083408A
Cited
FR571465A
Cited
GB279858A
Cited
US2332208A
Cited
US2439182A
Cited
US2652902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |