Patent US5928229A successfully refreshed from Google Patents.
US2981615A
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US
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Abrasive articles and method of making the same
Assignee: Unifrax I LLC
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Filing: 1959-09-08
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Granted: 1961-04-25
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Expires: 1979-09-08
Abstract
No abstract record available.
Inventors
- 👤 Richard A Baumgartner
- 👤 Howard M Canfield
- 👤 Halsey W Buell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:22
CPC Classifications
B; B24; B24D; B24D18/00; B24D18/0045; B24D5/00; B24D5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
AN ABRASIVE ARTICLE CONSISTING ESSENTIALLY OF A PLURALITY OF ADHESIVELY UNITED LAYERS OF ABRASIVE-COATED NONWOVEN TEXTILE FIBROUS SHEET MATERIAL, EACH OF SAID LAYERS OF FIBROUS SHEET MATERIAL HAVING A REAM WEIGHT OF FIBROUS MATERIAL OF ABOUT 4 POUNDS PER REAM AND A CALENDERED THICKNESS OF THE ORDER OF MAGNITUDE OF .003 TO .004 OF AN INCH, EACH OF THE INDIVIDUAL LAYERS OF FIBROUS SHEET MATERIAL BEING IRREGULARLY DISPOSED BUT RETAINING THE CONTINUITY OF ITS ORIGINAL STRUCTURE, THE FIBERS THEREOF BEING ENCAPSULATED WITH A THERMOPLASTIC POLYMERIC MATERIAL THAT IS SELECTED FROM THE GROUP CONSISTING OF THERMOPLASTIC VINYL POLYMERS, PERMANENTLY PLASTICIZED THERMOSETTING RESINS, COMPOUNDED LATEXES OF NATURAL AND OF SYNTHETIC RUBBERS, BLENDS OF SUCH COMPOUNDED LATEXES WITH CASEIN, AND BLENDS OF SUCH COMPOUNDED LATEXES WITH CELLULOSE DERIVATIVES, AND THAT IS CURED TO A PERMANENTLY FLEXIBLE AND RESILIENT STATE, THE COMBINING BOND FOR THE PLIES OF ABRASIVE-COATED SHEET MATERIAL COMPRISING A HEAT-HARDENED POLYMER.
Claim 2
Dependent Claim
150 words
AN ABRASIVE ARTICLE CONSISTING ESSENTIALLY OF A PLURALITY OF ADHESIVELY UNITED LAYERS OF ABRASIVE-COATED NONWOVEN TEXTILE FIBROUS SHEET MATERIAL, EACH OF SAID LAYERS OF FIBROUS SHEET MATERIAL HAVING A REAM WEIGHT OF FIBROUS MATERIAL OF ABOUT 4 POUNDS PER REAM AND A CALENDERED THICKNESS OF THE ORDER OF MAGNITUDE OF .003 TO .004 OF AN INCH, EACH OF THE INDIVIDUAL LAYERS OF FIBROUS SHEET MATERIAL BEING IRREGULARLY DISPOSED BUT RETAINING THE CONTINUITY OF ITS ORIGINAL STRUCTURE, THE FIBERS THEREOF BEING ENCAPSULATED WITH A THERMOPLASTIC POLYMERIC MATERIAL THAT IS SELECTED FROM THE GROUP CONSISTING OF THERMOPLASTIC VINYL POLYMERS, PERMANENTLY PLASTICIZED THERMOSETTING RESINS, COMPOUNDED LATEXES OF NATURAL AND OF SYNTHETIC RUBBERS, BLENDS OF SUCH COMPOUNDED LATEXES WITH CASEIN, AND BLENDS OF SUCH COMPOUNDED LATEXES WITH CELLULOSE DERIVATIVES, AND THAT IS CURED TO A PERMANENTLY FLEXIBLE AND RESILIENT STATE, THE COMBINING BOND FOR THE PLIES OF ABRASIVE-COATED SHEET MATERIAL COMPRISING A HEAT-HARDENED POLYMER.
References Cited (Backward Citations)
US2284716A
Cited
US2355667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |