US2648856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction vibration damping means for floor polishers
Assignee: Individual
•
Filing: 1948-03-17
•
Granted: 1953-08-18
•
Expires: 1968-03-17
Abstract
No abstract record available.
Inventors
- 👤 Heem Jan Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:15
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4075; A47L11/02; A47L11/20; A47L11/204
Claims Analysis
Total Claims: 0
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US2380013A
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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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |