Patent US3548551A successfully refreshed from Google Patents.
US3548551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flap-type abrasive wheel
Assignee: Merit Holding Inc
•
Filing: 1967-06-02
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Granted: 1970-12-22
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Expires: 1987-06-02
Abstract
No abstract record available.
Inventors
- 👤 Aleck Block
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:19
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/02; B24D13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2259475A
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US2599961A
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US2804730A
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US2821819A
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US2871632A
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US3053021A
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US3141269A
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US3212219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |