US2658228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner nozzle
Assignee: Lewyt Corp
•
Filing: 1950-04-22
•
Granted: 1953-11-10
•
Expires: 1970-04-22
Abstract
No abstract record available.
Inventors
- 👤 Carl E Meyerhoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:16
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/06; A47L9/0666
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1033016A
Cited
US1646088A
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US1629801A
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GB291790A
Cited
US1787537A
Cited
US1976998A
Cited
US2157077A
Cited
US2274560A
Cited
US2322804A
Cited
US2310554A
Cited
US2536443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |