US2930446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canister type vacuum cleaners
Assignee: Singer Co
•
Filing: 1957-03-18
•
Granted: 1960-03-29
•
Expires: 1977-03-18
Abstract
No abstract record available.
Inventors
- 👤 James W Momberg
- 👤 Francis A Gall
- 👤 Krzesiewski Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:14
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA486673A
Cited
US2439182A
Cited
US2591382A
Cited
US2610702A
Cited
US2696894A
Cited
US2699838A
Cited
US2794513A
Cited
US2779432A
Cited
US2751038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |