US3609925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding disc
Assignee: TELAS Y PAPELES ABRASIVOS
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Filing: 1969-07-22
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Granted: 1971-10-05
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Expires: 1989-07-22
Abstract
Abstract A GRINDING DISC COMPOSED OF A NUMBER OF LAYERS OF ABRASIVE MATERIAL BONDED TO EACH OTHER AND TO THE CARIER, THE LAYERS BEING DIVIDED INTO SECTION BY UNIFORMLY DISTRIBUTED RADIAL CHANNELS INTERSECTED BY TRANSVERSE CHANNELS THAT DO NOT MEET EACH OTHER AT A RADIAL CHANNEL, THUS PROVIDING A MULTIPLY CONNECTED NETWORK OF CHANNELS FOR THE CIRCULATION OF THE COOLING FLUID.
Inventors
- 👤 Manuel Comella-Riera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:25
CPC Classifications
B; B24; B24D; B24D11/00; B24D13/00; B24D13/18; B24D7/00; B24D7/10
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |