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US2645303A
Expired / Lapsed
US
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Vacuum cleaner
Assignee: Lewyt Corp
•
Filing: 1949-03-24
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Granted: 1953-07-14
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Expires: 1969-03-24
Abstract
No abstract record available.
Inventors
- 👤 Carl E Meyerhoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:56
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/365; A47L9/00; A47L9/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL57831C
Cited
US1933105A
Cited
US1991859A
Cited
US2192224A
Cited
US2242277A
Cited
US2443162A
Cited
US2564468A
Cited
US2541122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |