US2487470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quickly detachable coupling for suction cleaners
Assignee: Eureka Williams Co
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Filing: 1946-06-15
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Granted: 1949-11-08
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Expires: 1966-06-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph C Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:57
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/24; A47L9/242; F; F16; F16L; F16L37/00; F16L37/08; F16L37/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |