US3718535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preformed self-supporting, flexible and coherent electrically heatable laminar structure and method of manufacture thereof
Assignee: Sierracin Corp
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Filing: 1970-03-26
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Granted: 1973-02-27
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Expires: 1990-03-26
Abstract
Abstract Flexible sublaminates suitable for lamination between rigid transparent dielectric plies to form electrically powerable transparent safety glass-type constructions are prepared by first disposing on at least one surface of a carrier film a thin, adherent electrically conductive metallic coating and subsequently laminating to the metal-coated surface an interlayer film to form a flexible coherent laminar structure transparent when its exterior surfaces are smooth. Carrier films employed have an ultimate elongation of less than about 150 percent and tensile strength greater than about 5000 psi; interlayer films have ultimate elongation greater than about 150 percent and tensile strength less than about 6500 psi. Exemplary conductive metals are gold, silver, chromium, copper, and Inconel.
Inventors
- 👤 R Armstrong
- 👤 H Hoover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; H05B3/86; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10165; B32B17/10174; B32B17/1055; B32B17/10761; B32B2367/00; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/36; H05B2203/00; H05B2203/013; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
31 words
The structure of claim 1 wherein said interlayer film presents a textured exterior surface which is adapted to be made smooth by said further lamination of said structure between said plies.
Claim 2
Dependent Claim
56 words
The structure of claim 2 wherein but one surface of the carrier film bears a metal coating and further wherein a second interlayer film is adhered to the surface of the carrier film opposite the metal-coated surface thereof such that the non-adhered surfaces of the interlayer films present the exterior surfaces of the said laminar structure.
Claim 3
Dependent Claim
34 words
The structure of claim 2 wherein but one surface of the carrier film bears a metal coating, and further wherein an interlayer film is adhered only to the metal-coated surface of the carrier film.
Claim 4
Dependent Claim
35 words
The structure of claim 2 wherein the said carrier film is a polyethylene terephthalate polyester film, and wherein said interlayer film is selected from the group consisting of polyvinyl butyral, polyvinyl chloride, and polyurethane films.
Claim 5
Dependent Claim
22 words
The structure of claim 5 wherein said conductive metal is selected from the group consisting of gold, silver, chromium, copper and Inconel.
Claim 6
Dependent Claim
12 words
The structure of claim 6 wherein said interlayer film is polyvinyl butyral.
Claim 7
Dependent Claim
11 words
The structure of claim 7 wherein said conductive metal is gold.
Claim 8
Dependent Claim
30 words
The structure of claim 7 wherein said polyvinyl butyral contains from about 5 to 65 percent by weight plasticizer therefor, based on the total weight of plasticizer and polyvinyl butyral.
Claim 9
Dependent Claim
51 words
The structure of claim 2 wherein the said carrier film has an ultimate elongation of less than about 150 percent and tensile strength greater than about 5,000 psi, and wherein said interlayer film has an ultimate elongation of greater than about 150 percent and tensile strength less than about 6,500 psi.
Claim 10
Dependent Claim
22 words
The structure of claim 10 wherein said conductive metal is selected from the group consisting of gold, silver, chromium, copper and Inconel.
Claim 11
Independent Claim
129 words
A method which comprises disposing a thin adherent electrically conductive metallic coating on at least one surface of a carrier film and subsequently laminating To the side of said carrier film which bears the said coating a first interlayer film, said first interlayer film being at least about 0.015 inch in thickness, thereby forming a flexible, self-supporting and coherent electrically heatable laminar structure primarily defined in two dimensions and transparent when its exterior surfaces are smooth, said laminar structure consisting essentially of the metal-coated carrier film and said interlayer film, the surface of said interlayer film opposite that laminated to said metal-coated side presenting an exterior surface of the laminar structure, said laminar structure being adapted for further lamination between rigid plies to form a transparent safety glass-type laminate.
Claim 12
Dependent Claim
15 words
The method of claim 12 wherein but one surface of the carrier film is metal-coated.
Claim 13
Dependent Claim
20 words
The method of claim 13 wherein an interlayer film is laminated only to the metal-coated surface of the carrier film.
Claim 14
Dependent Claim
41 words
The method of claim 13 wherein a second interlayer film is laminated to the surface of the carrier film opposite the metal-coated surface thereof such that the non-adhered surfaces of the interlayer films present the exterior surfaces of the laminar structure.
Claim 15
Dependent Claim
30 words
The method of claim 15 wherein the interlayer films present textured exterior surfaces which are adapted to be made smooth by said further lamination of said structure between said plies.
Claim 16
Dependent Claim
35 words
The method of claim 12 wherein the said carrier film is a polyethylene terephthalate polyester film and wherein said interlayer film is selected from the group consisting of polyvinyl butyral, polyvinyl chloride and polyurethane films.
Claim 17
Dependent Claim
22 words
The method of claim 17 wherein said conductive metal is selected from the group consisting of gold, silver, chromium, copper and Inconel.
Claim 18
Dependent Claim
12 words
The method of claim 18 wherein said interlayer film is polyvinyl butyral.
Claim 19
Dependent Claim
11 words
The method of claim 18 wherein said conductive metal is gold.
Claim 20
Dependent Claim
51 words
The method of claim 12 wherein the said carrier film has an ultimate elongation of less than about 150 percent and tensile strength greater than about 5,000 psi, and wherein said interlayer film has an ultimate elongation of greater than about 150 percent and tensile strength less than about 6,500 psi.
Claim 21
Dependent Claim
22 words
The method of claim 21 wherein said conductive metal is selected from the group consisting of gold, silver, chromium, copper and Inconel.
References Cited (Backward Citations)
US2484484A
Cited
US2813960A
Cited
US2778758A
Cited
US2837454A
Cited
US3020376A
Cited
US3234062A
Cited
US3310458A
Cited
US3290203A
Cited
US3398040A
Cited
US3424642A
Cited
US3388035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |