Patent US2767904A successfully refreshed from Google Patents.
US2767904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor for vacuum producing machines
Assignee: Doyle Vacuum Cleaner Co
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Filing: 1953-03-23
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Granted: 1956-10-23
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Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Dewey I Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:55
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/365
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1044287A
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US1057282A
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US1822859A
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US1915449A
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US1995630A
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US2099172A
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US2082713A
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US2092043A
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US2540178A
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US2658665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |