US2659616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner implement and handle coupling
Assignee: Doyle Vacuum Cleaner Co
•
Filing: 1948-08-30
•
Granted: 1953-11-17
•
Expires: 1968-08-30
Abstract
No abstract record available.
Inventors
- 👤 Sr Dewey I Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:12
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/24; A47L9/242; A47L9/02; F; F16; F16L; F16L37/00; F16L37/24; F16L37/244; F16L37/252
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2322168A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |