US2730192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner filter assembly
Assignee: Lewyt Corp
•
Filing: 1953-11-27
•
Granted: 1956-01-10
•
Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 Carl E Meyerhoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:40
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US996691A
Cited
US963139A
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US1847233A
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DE592015C
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US2112213A
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US2467503A
Cited
US2576310A
Cited
US2557279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |