US2780533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive article and method of making
Assignee: Dart Industries Inc
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Filing: 1950-03-07
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Granted: 1957-02-05
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Expires: 1970-03-07
Abstract
No abstract record available.
Inventors
- 👤 Hurst Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:54
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/04; A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; B24D18/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
AN ABRASIVE ARTICLE COMPRISING A FLEXIBLE ABRASIVE COATED MATERIAL COMPRISING A SINGLE LAYER OF ABRASIVE PARTICLES SUBSTANTIALLY ONE GRIT SIZE IN THICKNESS ADHESIVELY SECURED BY MEANS OF AN ADHESIVE SELECTED FROM THE GROUP CONSISTING OF AN ANIMAL GLUE, A LATEX-RESIN ADHESIVE, AND A LATEX-CASEIN ADHESIVE TO A FLEXIBLE BACKING COMPRISING A NON-ABRASIVE LAYER OF SPONGE RUBBER OF SUFFICIENT THICKNESS TO IMPART YIELDABILITY AND RESILIENCE TO THE ARTICLE AND A FABRIC REINFORCING LAYER, SAID FABRIC REINFORCING LAYER BEING ADHESIVELY BONDED TO SAID LAYER OF SPONGE RUBBER.
References Cited (Backward Citations)
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Cited
US1966101A
Cited
US2001911A
Cited
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Cited
US2236597A
Cited
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US2279673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |