US3934064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite structures of knitted glass fabric and thermoplastic polyfluoroethylene resin sheet
Assignee: EIDP Inc
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Filing: 1974-09-05
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Granted: 1976-01-20
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Expires: 1994-09-05
Abstract
Abstract Extensible structures are made by partially embedding a selected knitted glass fabric into a perhalopolyfluoroethylene polymer resin sheet. The embedding can be done by pressing the glass fabric into one surface of the sheet heated to a temperature at which it is soft. The resultant composite structure is thermoformable into such shapes as a dished head. The exposed surface of the glass fabric can be impregnated with a castable material useful for such purposes as adhering the composite structure to a substrate such as a metal surface or for reinforcing the composite structure. The composite structure instead of being thermoformed can be rolled and seamwelded into a cylinder shape which can be used as a cylindrical tank lining or as a duct.
Inventors
- 👤 Edwin Doll Lowthian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:52
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B29C51/00; B29C51/14; B29C51/145; C; C08; C08J; C08J5/00; C08J5/04; C08J5/0405; C08J5/043; C08J5/047; C08J5/048; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; Y; Y10; Y10S; Y10S273/00; Y10S273/03; Y10S273/04; Y10S273/07; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/24; Y10T428/24628; Y10T442/00; Y10T442/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
46 words
A composite structure comprising a substantially flat thermoformable sheet of a melt-fabricable perhalopolyfluoroethylene polymer resin and a knitted fabric made of glass fiber yarn and at least one monofilament of a melt-fabricable perhalopolyfluoroethylene polymer resin, said fabric being partially embedded in a surface of said sheet.
Claim 2
Dependent Claim
46 words
A composite structure comprising a substantially flat thermoformable sheet of a melt-fabricable perhalopolyfluoroethylene polymer resin and a knitted fabric made of glass fiber yarn and at least one monofilament of a melt-fabricable perhalopolyfluoroethylene polymer resin, said fabric being partially embedded in a surface of said sheet.
Claim 3
Dependent Claim
18 words
The composite structure of claim 1 wherein said melt-fabricable perhalopolyfluoroethylene polymer resin is a melt-fabricable tetrafluoroethylene copolymer resin.
Claim 4
Dependent Claim
23 words
The composite structure of claim 2 wherein the melt-fabricable tetrafluoroethylene copolymer resin in the sheet and in the monofilament is a tetrafluoroethylene/hexafluoropropylene copolymer.
Claim 5
Dependent Claim
25 words
The composite structure of claim 2 wherein the melt-fabricable tetrafluoroethylene copolymer resin in the sheet and in the monofilament is a tetrafluoroethylene/perfluoro(propyl vinyl ether) copolymer.
Claim 6
Dependent Claim
23 words
The composite structure of claim 2 wherein the melt-fabricable tetrafluoroethylene copolymer resin in the sheet and in the monofilament is a tetrafluoroethylene/ethylene copolymer.
Claim 7
Dependent Claim
21 words
The composite structure of claim 1 and castable adhesive or thermosetting resin material embedded in the exposed surface of said fabric.
Claim 8
Dependent Claim
12 words
The composite structure of claim 6 wherein said castable material contains reinforcement.
Claim 9
Dependent Claim
16 words
The composite structure of claim 1 in the form of a liner for a dished head.
Claim 10
Dependent Claim
12 words
The composite structure of claim 1 in the form of a cylinder.
Claim 11
Dependent Claim
14 words
The composite structure of claim 1 having an extensibility of at least 10 percent.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |