US3663352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helically crimped continuous filament yarn
Assignee: Monsanto Co
•
Filing: 1968-11-01
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Granted: 1972-05-16
•
Expires: 1988-11-01
Abstract
Abstract One side of a drawn homogeneous filament having at least 17 percent boiling water shrinkage is heated above its melting point while under high tension. The filament is then prebulked while under substantially no tension by being exposed to hot air at a temperature above the yarn glass transition temperature, soon after the initial heat treatment, and preferably before being wound. This produces a tighter crimp when the yarn is later subjected to hot water.
Inventors
- 👤 Joseph A Self
- 👤 Gerald W Sovereign
- 👤 Alton E Peacock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:47
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/004; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2925; Y10T428/2933; Y10T428/2964; Y10T428/298
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
The filament defined in claim 1, wherein r is within the range of 0.018 to 0.024 millimeter.
Claim 2
Dependent Claim
17 words
The filament defined in claim 1, wherein R is within the range of 0.1 to 0.14 millimeter.
Claim 3
Dependent Claim
17 words
The filament defined in claim 1, wherein P is in the range of 0.19 to 0.5 millimeter.
Claim 4
Dependent Claim
19 words
The filament defined in claim 1, wherein R-r divided by R+r is within the range of 0.66 to 0.75.
Claim 5
Dependent Claim
17 words
The filament defined in claim 1, wherein said filament is flattened on the outside of the helix.
References Cited (Backward Citations)
US2974391A
Cited
US3358344A
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US3358345A
Cited
US3128527A
Cited
US3302385A
Cited
US3224068A
Cited
US3317978A
Cited
US3379807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |