Patent US5614306A successfully refreshed from Google Patents.
US3723213A
Expired / Lapsed
US
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Method of making non-woven pile fabric
Assignee: Rohm and Haas Co
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Filing: 1970-08-18
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Granted: 1973-03-27
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Expires: 1990-08-18
Abstract
Abstract Continuous strands of yarn are formed into loops defining upper and lower bight portions. A body of liquid resinous backing material is formed, and the lower bight portions of the loops of yarn are moved into the liquid backing material so that these lower bight portions are substantially embedded within and penetrated by the backing material. The backing material is then solidified.
Inventors
- 👤 C Hoey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:18
CPC Classifications
D; D04; D04H; D04H11/00; D04H11/04; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23957; Y10T428/23964; Y10T428/23986
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
The method as defined in claim 1 wherein the backing material is thermosettable and solidification thereof is caused by heating it.
Claim 2
Dependent Claim
21 words
The method as defined in claim 1 wherein the backing material is thermoplastic and solidification thereof is caused by cooling it.
Claim 3
Dependent Claim
23 words
The method as defined in claim 1 wherein the body of liquid backing material is produced by heating A normally solid backing material.
Claim 4
Dependent Claim
15 words
The method as defined in claim 4 wherein the backing material comprises a resinous substance.
References Cited (Backward Citations)
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US2639250A
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US3411966A
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US3542613A
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US3525662A
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US3560284A
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |