US2941231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction cleaner
Assignee: Individual
•
Filing: 1958-02-17
•
Granted: 1960-06-21
•
Expires: 1978-02-17
Abstract
No abstract record available.
Inventors
- 👤 Grumbkow Botho Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:14
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/0009; A47L5/00; A47L5/12; A47L5/22; A47L5/24; A47L9/0018; A47L9/0027; A47L9/10; A47L9/14; A47L9/1427
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1573772A
Cited
FR624844A
Cited
GB261780A
Cited
US2002636A
Cited
US1954416A
Cited
US2392205A
Cited
US2809390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |