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Patent US2443413A successfully refreshed from Google Patents.
US2443413A
Expired / Lapsed
US
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Brush retaining aid in sanding drums
Assignee: Merit Products Inc
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Filing: 1945-05-21
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Granted: 1948-06-15
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Expires: 1965-05-21
Abstract
No abstract record available.
Inventors
- 👤 Teofil L Bonkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:31
CPC Classifications
B; B24; B24D; B24D9/00; B24D9/003
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) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |