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US2843314A
Expired / Lapsed
US
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Vacuum cleaner suction unit
Assignee: Whirlpool Corp
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Filing: 1954-09-27
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Granted: 1958-07-15
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Expires: 1974-09-27
Abstract
No abstract record available.
Inventors
- 👤 Hansen Clarence Ellegaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:30
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1418238A
Cited
US1866154A
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US2060980A
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US2020092A
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US2307827A
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US2670896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |