US3607509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of netlike structures
Assignee: Dow Chemical Co
•
Filing: 1969-07-16
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Granted: 1971-09-21
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Expires: 1989-07-16
Abstract
Abstract Thermoplastic net comprising bonded filaments which have at least two different thermoplastic components disposed in generally spirally arranged alternating layers wherein the material of one of the layers is monodirectionally oriented and the remaining material is generally unoriented is disclosed.
Inventors
- 👤 Walter J Schrenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/345; B29C48/03; B29C48/05; B29C48/09; B29C48/13; B29C48/301; B29C48/10; B29L; B29L2028/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
27 words
The method of claim 1, wherein the net is subsequently stretched at a temperature suitable for the orientation of at least one of the thermoplastic resinous components.
Claim 2
Dependent Claim
19 words
The method of claim 1, wherein the annular stream has an outer layer of one of the resinous components.
Claim 3
Dependent Claim
28 words
The method of claim 1, wherein the stream is extruded as a plurality of filaments which are contacted in the heat plastified form outside of the extrusion apparatus.
Claim 4
Dependent Claim
26 words
The method of claim 1, wherein the layers in the annular stream have a generally spiral configuration, when the stream is viewed in axial cross section.
Claim 5
Dependent Claim
21 words
The method of claim 1, wherein annular stream is disposed between generally cylindrical confining walls which rotate relative to one another.
Claim 6
Dependent Claim
10 words
The method of claim 6, wherein the walls are counterrotating.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |