Patent US4569088A successfully refreshed from Google Patents.
US4569088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry workers' protective garment
Assignee: EIDP Inc
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Filing: 1983-10-03
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Granted: 1986-02-11
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Expires: 2003-10-03
Abstract
Abstract A garment for protection against molten metals is constructed of a composite fabric having an area weight of no more than 1000 g/m 2 comprised of an outer layer which is a visually continuous, optically opaque sheet of poly(tetrafluoroethylene) fibers having an area weight of at least 170 g/m 2 securely attached throughout its interface with an inner durable fabric layer of non-fusible, textile fibers having an area weight of 70-700 g/m 2 .
Inventors
- 👤 Peter E. Frankenburg
- 👤 Herbert G. Lauterbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:55
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/08; B32B5/12; A; A41; A41D; A41D31/00; A41D31/04; A41D31/08; A41D31/085; B32B5/06; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4282; D04H1/4318; D04H1/44; D04H1/46; D04H1/492; D04H1/498; D04H1/70; D04H1/72; D04H1/732; D21; D21H; D21H13/00; D21H13/10; D21H13/20; D21H13/26; D21H5/00; D21H5/12; D21H5/20; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2307/00; B32B2307/70; B32B2307/724; B32B2571/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A protective garment for protection from molten metals comprised of a drapeable, air permeable composite fabric having an area weight of no more than 1000 g/m 2 and "passing" the Molten Aluminum Splash Test and constructed of a visually continuous, optically opaque outer layer of poly(tetrafluoroethylene) fibers having an area weight of at least 170 g/m 2 securely attached throughout its interface with an inner durable fabric layer of non-fusible textile fibers having an area weight of 70 g/m 2 to 700 g/m 2 .
Claim 2
Dependent Claim
85 words
A protective garment for protection from molten metals comprised of a drapeable, air permeable composite fabric having an area weight of no more than 1000 g/m 2 and "passing" the Molten Aluminum Splash Test and constructed of a visually continuous, optically opaque outer layer of poly(tetrafluoroethylene) fibers having an area weight of at least 170 g/m 2 securely attached throughout its interface with an inner durable fabric layer of non-fusible textile fibers having an area weight of 70 g/m 2 to 700 g/m 2 .
Claim 3
Dependent Claim
26 words
The garment of claim 1 wherein the sheet of poly(tetrafluoroethylene) fibers is a needled batt having an area weight of at least 250 g/m 2 .
Claim 4
Dependent Claim
19 words
The garment of claim 1 wherein the sheet of poly(tetrafluoroethylene) fibers is a waterleaf made on a paper machine.
Claim 5
Dependent Claim
21 words
The garment of claim 1 wherein the outer layer and the inner layer of the fabric are attached by mechanical needling.
Claim 6
Dependent Claim
21 words
The garment of claim 1 wherein the outer layer and the inner layer of the fabric are attached by hydraulic needling.
Claim 7
Dependent Claim
16 words
The garment of claim 1 wherein the inner layer fabric is comprised of poly(m-phenylene isophthalamide) fibers.
Claim 8
Dependent Claim
16 words
The garment of claim 1 wherein the inner layer fabric is comprised of poly(p-phenylene terephthalamide) fibers.
Claim 9
Dependent Claim
35 words
The garment of claim 1 wherein the inner layer fabric is comprised of a blend of 3 to 50% by weight of poly(p-phenylene terephthalamide) fibers and 50 to 97% by weight of poly(m-phenylene isophthalamide) fibers.
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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |