Patent US5391089A successfully refreshed from Google Patents.
US2974346A
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Nozzle and filtering device for vacuum cleaners
Assignee: John Oster Manufacturing Co
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Filing: 1959-10-07
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Granted: 1961-03-14
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Expires: 1979-10-07
Abstract
No abstract record available.
Inventors
- 👤 Paul T Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:45
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US971044A
Cited
US984098A
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US1088954A
Cited
GB327922A
Cited
US2088870A
Cited
US2244165A
Cited
US2626418A
Cited
US2729303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |