US2881064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fill-resistant abrasive articles
Assignee: 3M Co
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Filing: 1955-11-07
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Granted: 1959-04-07
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Expires: 1975-11-07
Abstract
No abstract record available.
Inventors
- 👤 Walter J Rankin
- 👤 Richard G Riedesel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:50
CPC Classifications
B; B24; B24D; B24D11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A FLEXIBLE ABRASIVE ARTICLE HIGHLY RESISTANT TO FILLING BY ABRADED FRAGMENTS FROM SURFACES BEING ABRADED, SAID ARTICLE COMPRISING A FLEXIBLE, ORGANIC, BACKING-SUPPORT MEMBER, A LAYER OF MINERAL ABRASIVE GRAIN ADHESIVELY BONDED THERETO BY AN ABRASIVE BOND MATERIAL FREE OF ORGANO-SILICON COMPOUND, A SIZING COAT OVER SAID LAYER OF MINERAL ABRASIVE GRAIN, SAID SIZING COAT BEING FREE OF ORGANO-SILICON COMPOUND, AND UPON THE SIZE-COATED MINERAL SIDE OF THE FOREGOING STRUCTURE A SURFACE DEPOSIT CONSISTING ESSENTIALLY OF BETWEEN 0.006 AND 1.3 GRAINS PER SQUARE INCH OF AN ORGANO-SILICON COMPOUND CHARACTERIZED BY BEING NON-TRANSEFERRING TO THE SURFACE OF MATERIALS ABRADED AND HAVING A CARBON TO SILICON ATOM RATIO OF AT LEAST 1 TO 1, SAID ARTICLE BEING CHARACTERIZED BY AN ABRADING LIFE AT LEAST 15-20% LONGER THAN A LIKE ARTICLE WITHOUT SAID SURFACE DEPOSIT.
Claim 2
Dependent Claim
131 words
A FLEXIBLE ABRASIVE ARTICLE HIGHLY RESISTANT TO FILLING BY ABRADED FRAGMENTS FROM SURFACES BEING ABRADED, SAID ARTICLE COMPRISING A FLEXIBLE, ORGANIC, BACKING-SUPPORT MEMBER, A LAYER OF MINERAL ABRASIVE GRAIN ADHESIVELY BONDED THERETO BY AN ABRASIVE BOND MATERIAL FREE OF ORGANO-SILICON COMPOUND, A SIZING COAT OVER SAID LAYER OF MINERAL ABRASIVE GRAIN, SAID SIZING COAT BEING FREE OF ORGANO-SILICON COMPOUND, AND UPON THE SIZE-COATED MINERAL SIDE OF THE FOREGOING STRUCTURE A SURFACE DEPOSIT CONSISTING ESSENTIALLY OF BETWEEN 0.006 AND 1.3 GRAINS PER SQUARE INCH OF AN ORGANO-SILICON COMPOUND CHARACTERIZED BY BEING NON-TRANSEFERRING TO THE SURFACE OF MATERIALS ABRADED AND HAVING A CARBON TO SILICON ATOM RATIO OF AT LEAST 1 TO 1, SAID ARTICLE BEING CHARACTERIZED BY AN ABRADING LIFE AT LEAST 15-20% LONGER THAN A LIKE ARTICLE WITHOUT SAID SURFACE DEPOSIT.
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 |