Patent US4240000A successfully refreshed from Google Patents.
Patent US3758393A successfully refreshed from Google Patents.
US3758393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activating product
Assignee: Saint Gobain Abrasives Inc
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Filing: 1971-03-19
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Granted: 1973-09-11
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Expires: 1991-03-19
Abstract
Abstract A surface activating material in the form of a sheet wherein a plurality of fine, flexible non-conductive projections, such as bristles, protrude substantially uniformly from a porous, extremely open, fluid-entrapping and circulating matrix and wherein fine, non-conductive hard particles are affixed to such projections and to the surface of the open matrix from which they protrude.
Inventors
- 👤 H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:14
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/22
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |