US3306808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curl resistant dust collecting mats
Assignee: Callaway Mills Co
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Filing: 1963-11-22
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Granted: 1967-02-28
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Expires: 1983-11-22
Abstract
No abstract record available.
Inventors
- 👤 Dewey T Thompson
- 👤 William T Fincher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:07
CPC Classifications
A; A47; A47L; A47L23/00; A47L23/22; A47L23/26; A47L23/266; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/23986; Y10T428/23993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A DUST COLLECTING MAT COMPRISING A PLURALITY OF CELULOSIC YARNS TUFTED TO ONE SIDE OF A CELLULOSIC FABRIC HAVING A POTENTIAL SHRINKAGE FROM 0 TO ABOUT 12.5%, THE OTHER SIDE OF SAID FABRIC HAVING AN ELASTOMERIC BACKING COMPRISING ABOUT 20% TO 60% ACRYLONITRILE COPOLYMERIZED WITH ABOUT 40% TO 80% OF A CONJUGATED DIENE HAVING FROM 4 TO 6 CARBON ATOMS PER MOLECULE OF DIENE MONOMER, SAID TUFTED YARNS HAVING ABSORBED THEREON A PETROLEUM, DUST COLLECTING OIL HAVING AN ANILINE POINT ABOVE ABOUT 230*F., A SPECIFIC GRAVEITY BETWEEN ABOUT 0.85 AND ABOUT 0.95, AND A BOILING POINT ABOVE ABOUT 500*F.
Claim 2
Dependent Claim
99 words
A DUST COLLECTING MAT COMPRISING A PLURALITY OF CELULOSIC YARNS TUFTED TO ONE SIDE OF A CELLULOSIC FABRIC HAVING A POTENTIAL SHRINKAGE FROM 0 TO ABOUT 12.5%, THE OTHER SIDE OF SAID FABRIC HAVING AN ELASTOMERIC BACKING COMPRISING ABOUT 20% TO 60% ACRYLONITRILE COPOLYMERIZED WITH ABOUT 40% TO 80% OF A CONJUGATED DIENE HAVING FROM 4 TO 6 CARBON ATOMS PER MOLECULE OF DIENE MONOMER, SAID TUFTED YARNS HAVING ABSORBED THEREON A PETROLEUM, DUST COLLECTING OIL HAVING AN ANILINE POINT ABOVE ABOUT 230*F., A SPECIFIC GRAVEITY BETWEEN ABOUT 0.85 AND ABOUT 0.95, AND A BOILING POINT ABOVE ABOUT 500*F.
References Cited (Backward Citations)
US2033170A
Cited
US3007808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |