US3729920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novelty textile yarns
Assignee: Akzo Nobel UK PLC
•
Filing: 1970-03-06
•
Granted: 1973-05-01
•
Expires: 1990-03-06
Abstract
Abstract A novelty core yarn comprising a continuous filamentary glass core, preferably texturized, provided with a sheath consisting of a roving of textile fibers having flame-resistant properties. The sheath may consist of a roving of modacrylic textile fibers having inherent, built-in flame-resistance and composed of a copolymer of acrylonitrile with vinylidene chloride, vinyl chloride or both.
Inventors
- 👤 L Sayers
- 👤 J Barnes
- 👤 N Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:46
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/443; D02G3/02; D02G3/16; D02G3/18; D02G3/182; D02G3/185; D10; D10B; D10B2101/00; D10B2101/02; D10B2101/06; D10B2321/00; D10B2321/04; D10B2321/041; D10B2321/10; Y; Y10; Y10S; Y10S57/00; Y10S57/904
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
17 words
A core yarn as claimed in claim 1, wherein the core yarn consists of texturized glass filaments.
Claim 2
Dependent Claim
31 words
A novelty core yarn consisting essentially of a continuous filamentary glass core provided with a sheath of a roving of fibers composed of an acetone-soluble copolymer of acrylonitrile and vinylidene chloride.
Claim 3
Dependent Claim
17 words
A core yarn as claimed in claim 3 wherein the core yarn consists of texturized glass filaments.
References Cited (Backward Citations)
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |