US2073347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible wheel for vacuum cleaners
Assignee: QUADREX CORP
•
Filing: 1936-10-21
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Granted: 1937-03-09
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Expires: 1956-10-21
Abstract
No abstract record available.
Inventors
- 👤 Leathers Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:37
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/006; B60B33/0063; A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/24; A47L9/00; A47L9/009; A47L9/02; B60B33/0028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-03-08 | 1940-09-07 | 1941-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-08 | 1944-09-07 | 1945-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-08 | 1948-09-07 | 1949-03-09 | $7700.00 | Window Closed / Lapsed |