US2631312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring brush control for carpet sweepers
Assignee: Bissell Homecare Inc
•
Filing: 1946-03-30
•
Granted: 1953-03-17
•
Expires: 1966-03-30
Abstract
No abstract record available.
Inventors
- 👤 Fred W Pullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:25
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4052; A47L11/4058; A47L11/32; A47L11/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US224316A
Cited
US2239276A
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US2228528A
Cited
US2307156A
Cited
US2436460A
Cited
US2418725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |