US2987751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner assembly
Assignee: Lewyt Corp
•
Filing: 1957-12-12
•
Granted: 1961-06-13
•
Expires: 1977-12-12
Abstract
No abstract record available.
Inventors
- 👤 Carl E Meyerhoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:08
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2889; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/362; A47L9/02; A47L9/04; A47L9/24; A47L9/242; A47L9/246; A47L9/2868
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US630419A
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US2072689A
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US2003098A
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US2072690A
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US2320367A
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US2348861A
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US2570222A
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US2524522A
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US2769997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |