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US2711554A
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US
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Vacuum cleaning tool
Assignee: Doyle Vacuum Cleaner Co
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Filing: 1949-08-10
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Granted: 1955-06-28
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Expires: 1969-08-10
Abstract
No abstract record available.
Inventors
- 👤 Sr Dewey I Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:15
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02; A47L9/06; A47L9/0606; A47L9/0613
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE178760C
Cited
FR362298A
Cited
US919043A
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US1651894A
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US1994871A
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US2016294A
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US2203088A
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US2272960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |