Patent US2770928A successfully refreshed from Google Patents.
US2770928A
Expired / Lapsed
US
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Abrasive article
Assignee: Unifrax I LLC
•
Filing: 1951-06-15
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Granted: 1956-11-20
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Expires: 1971-06-15
Abstract
No abstract record available.
Inventors
- 👤 William K Van Ormer
- 👤 Joseph B Aust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:46
CPC Classifications
B; B24; B24D; B24D11/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
AN ABRASIVE ARTICLE COMPRISING (A) A BACKING, (B) AN ANCHORING LAYER COMPRISING AT LEAST ONE COURSE OF TEXTILE FIBER BRAIDED STRAND ADHESIVELY IMPREGNATED AND BONDED TO SAID BACKING BY MEANS OF A FLEXIBLE RUBBER BASE ADHESIVE AND CONTAINING A PLURALITY OF VERTICALLY EXTENDING SPACED TEXTILE FIBER REINFORCING PILE MEMBERS SECURED THEREIN WITH THE FREE ENDS PROJECTING ABOVE THE TOP SURFACE OF SAID ANCHORING LAYER, AND (C) A LAYER OF RESIN-BONDED ABRASIVE MATERIAL IMPOSED UPON SAID ANCHORING LAYER AND FILLING THE SPACE BETWEEN SAID SPACED PILE MEMBERS SO AS TO FORM A SUBSTANTIALLY CONTINUOUS GRINDING FACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |