US3686848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly resilient polypropylene yarn
Assignee: UNIROYAL HOLDING Inc WORLD HEADQUARTERS MIDDLEBURY CONNECTICUT 06749 A CORP OF NEW JERSEY
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Filing: 1970-04-23
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Granted: 1972-08-29
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Expires: 1990-04-23
Abstract
Abstract Textured Polypropylene yarn possessing high resilience comparable to nylon as a result of unique structural configuration. The yarns are particularly suited for use in carpeting and upholstery.
Inventors
- 👤 Robert Miller
- 👤 Robert J Clarkson
- 👤 Frank C Cesare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:22
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/32; D02G3/326; D02G1/00; D02G1/16; D02G1/165; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
The yarn defined in claim 1 wherein the filaments possess an average crimp count of 9-15 crimps per inch.
Claim 2
Dependent Claim
17 words
The yarn defined in claim 2 wherein the tenacity is between 0.80 and 2.25 grams per denier.
Claim 3
Dependent Claim
20 words
The yarn defined in claim 1 which contains up to 10 percent by weight poly(vinylpyridine) in admixture with said polypropylene.
Claim 4
Dependent Claim
20 words
The yarn defined in claim 1 which contains a minor amount of organic or inorganic pigment to color said yarn.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |