Patent US3648704A successfully refreshed from Google Patents.
US2881065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polishing instrument
Assignee: Bayer Corp
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Filing: 1957-02-18
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Granted: 1959-04-07
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Expires: 1977-02-18
Abstract
No abstract record available.
Inventors
- 👤 Reuter Franz Gottfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/001; B24D11/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
A CASTABLE MELT SUITABLE FOR SHAPING AND CURING TO FORM A SOLIDIFIED SUBSTANTIALLY HOMOGENEOUS POLYURETHANE ARTICLE HAVING ABRASIVE PARTICLES DISTRIBUTED THEREIN AND EXPOSED AT THE SURFACE THEREOF COMPRISING, ABRASIVE PARTICLES COATED WITH A DISPERSING AGENT COMPATIBLE WITH A POLYURATHAN MELT AND SELECTED FROM THE GROUP CONSISTING OF SILICONE OIL HAVING A VISCOSITY OF FROM ABOUT 50 TO ABOUT 500 CENTISTOKES AT 20*C.,
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |