Patent US3772137A successfully refreshed from Google Patents.
US3772137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester pillow batt
Assignee: EIDP Inc
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Filing: 1971-06-08
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Granted: 1973-11-13
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Expires: 1991-06-08
Abstract
Abstract A batt having high filling power and bulk under load comprising crimped hollow polyester filaments. Critical ranges for the percent void, denier, crimp frequency, and crimp index are defined for the fibers which interact to provide batts having higher bulk under load than would be expected by virtue of the voids alone when compared with the bulk of solid fibers. Also disclosed is a process for making the batts.
Inventors
- 👤 J Tolliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:33
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; A; A47; A47C; A47C27/00; A47C27/12; A47C27/22; B; B68; B68G; B68G1/00; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/435; D04H1/4391; Y; Y10; Y10S; Y10S5/00; Y10S5/948; Y10S5/952; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
A polyethylene terephthalate pillow batt which has high filling power and bulk under load, consisting of intermingled, hollow, 4 to 6 denier filaments crimped in a saw-toothed type of configuration to impart a crimp frequency of six to nine crimps per inch of uncrimped filament and a crimp index within the range of 25 to 35; the filaments being characterized by a round cross section with a single hole of square shape centrally located in the filament and forming a hollow core extending throughout the length of the filament, the hollow core being 13 to 25 percent of the volume of the filament and free from collapse.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |