Patent US4773920B1 successfully refreshed from Google Patents.
US4773920B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated abrasive suitable for use as a lapping material.
Assignee: 3M Co
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Filing: 1987-03-18
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Granted: 1995-05-02
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Expires: 2007-03-18
Abstract
No abstract record available.
Inventors
- 👤 Jonathan N Chasman
- 👤 Ramon F Hegel
- 👤 Philip E Kendall
- 👤 Nathan B Postma
- 👤 Douglas S Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:27
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/001; B24D11/00; B24D3/02; B24D3/20; B24D3/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31536
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) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |