US4359501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis resistant polyaryletherketone fabric
Assignee: Albany International Corp
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Filing: 1981-10-28
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Granted: 1982-11-16
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Expires: 2001-10-28
Abstract
Abstract An industrial fabric of woven monofilament threads comprised of a melt extrudable polyaryletherketone having hydrolysis resistance at elevated temperatures, such fabric exhibiting a high modulus of elongation making it suitable for conveying applications in various industrial processing.
Inventors
- 👤 Venanzio DiTullio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:07
CPC Classifications
D; D03; D03D; D03D3/00; D03D3/04; D01; D01F; D01F6/00; D01F6/58; D01F6/66; D01F6/665; D03D1/00; D03D1/0094; D03D15/00; D03D15/20; D03D15/283; D03D15/50; D03D15/573; D21; D21F; D21F1/00; D21F1/0027; D10; D10B; D10B2331/00; D10B2331/02; D10B2331/021; D10B2331/06; D10B2331/061; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/339; Y10T442/3976
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A fabric having machine direction and cross machine direction threads interwoven with one another in a repeated pattern and finished into an endless belt, wherein certain of the threads are a monofilament of a melt extrudable polyaryletherketone selected from the group consisting of polyetherketones having repeating units of --Φ-O-Φ-CO-- or --Φ-Φ-O-Φ-CO-- and polyetheretherketones having repeating units of --Φ-O-Φ-CO-Φ-O--.
Claim 2
Dependent Claim
58 words
A fabric having machine direction and cross machine direction threads interwoven with one another in a repeated pattern and finished into an endless belt, wherein certain of the threads are a monofilament of a melt extrudable polyaryletherketone selected from the group consisting of polyetherketones having repeating units of --Φ-O-Φ-CO-- or --Φ-Φ-O-Φ-CO-- and polyetheretherketones having repeating units of --Φ-O-Φ-CO-Φ-O--.
Claim 3
Dependent Claim
25 words
A fabric as in claim 1 having hydrolysis resistance for the threads thereof of maintaining 90% of tensile strength at temperatures up to 250° F.
Claim 4
Dependent Claim
26 words
A fabric as in claim 2, wherein certain of said threads are of said polyaryletherketone and others of said threads are of another synthetic, resinous material.
Claim 5
Dependent Claim
80 words
A fabric having machine direction and cross machine direction threads interwoven with one another in a repeated pattern and finished into an endless belt with threads of the belt being thermally set after weaving to stabilize the fabric; wherein certain of the threads are a monofilament polyaryletherketone having thermal resistance of 90% retention of tensile strength at temperatures up to 500° F.; and the fabric has a modulus of at least 4,000 for an open area of within thirty percent.
Claim 6
Dependent Claim
80 words
A fabric having machine direction and cross machine direction threads interwoven with one another in a repeated pattern and finished into an endless belt with threads of the belt being thermally set after weaving to stabilize the fabric; wherein certain of the threads are a monofilament polyaryletherketone having thermal resistance of 90% retention of tensile strength at temperatures up to 500° F.; and the fabric has a modulus of at least 4,000 for an open area of within thirty percent.
Claim 7
Dependent Claim
12 words
A fabric as in claim 4, wherein said polyaryletherketone is a polyetheretherketone.
Claim 8
Dependent Claim
23 words
A fabric as in claim 4, wherein certain of said threads are of said polyaryletherketone and others of said threads are of metal.
Claim 9
Dependent Claim
70 words
A fabric having machine direction and cross machine direction threads interwoven with one another in a repeated pattern and finished into an endless belt with the threads of the belt being thermally set after weaving to stabilize the fabric; wherein certain of the threads are of polyetheretherketone having hydrolysis resistance of maintaining 90% of tensile strength upon submission to moist heat of 250° F. at 15 compounds per square inch.
Claim 10
Dependent Claim
70 words
A fabric having machine direction and cross machine direction threads interwoven with one another in a repeated pattern and finished into an endless belt with the threads of the belt being thermally set after weaving to stabilize the fabric; wherein certain of the threads are of polyetheretherketone having hydrolysis resistance of maintaining 90% of tensile strength upon submission to moist heat of 250° F. at 15 compounds per square inch.
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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) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |