US4064314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weather-resistant transparent composite film
Assignee: 3M Co
•
Filing: 1975-04-16
•
Granted: 1977-12-20
•
Expires: 1995-04-16
Abstract
Abstract A composite film structure which is useful as an inexpensive, nonbrittle, outdoor-facing window pane in greenhouses and similar structures, comprises an oriented support film laminated to a weather-resistant oriented film of polymethylmethacrylate.
Inventors
- 👤 Eugene L. McKenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:37
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/0073; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B18/00; B32B27/30; B32B27/308; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B32B2307/00; B32B2307/40; B32B2307/412; B32B2307/50; B32B2307/514; B32B2307/70; B32B2307/712; B32B2333/00; B32B2333/04; B32B2333/12; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31826; Y10T428/31833; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A transparent composite film useful as an inexpensive, nonbrittle, outdoor-facing window pane comprising a. a continuous transparent high-tensile-strength oriented polymeric support film comprising a linear oriented crystalline heat-set polyester polymer; b. a continuous transparent weather-resistant oriented polymethylmethacrylate film; and c. a transparent adhesive layer disposed between said support and weather-resistant films to laminate the films together.
Claim 2
Dependent Claim
56 words
A transparent composite film useful as an inexpensive, nonbrittle, outdoor-facing window pane comprising a. a continuous transparent high-tensile-strength oriented polymeric support film comprising a linear oriented crystalline heat-set polyester polymer; b. a continuous transparent weather-resistant oriented polymethylmethacrylate film; and c. a transparent adhesive layer disposed between said support and weather-resistant films to laminate the films together.
Claim 3
Dependent Claim
25 words
A composite film of claim 1 in which an absorber of ultraviolet light is dispersed in at least one of said films or adhesive layer.
Claim 4
Dependent Claim
21 words
A composite film of claim 1 in which said weather-resistant film includes an absorber of ultraviolet light dispersed in the film.
Claim 5
Dependent Claim
14 words
A composite film of claim 1 in which said support film comprises polyethylene terephthalate.
Claim 6
Dependent Claim
15 words
A composite film of claim 1 in which said adhesive layer is a pressure-sensitive adhesive.
Claim 7
Dependent Claim
22 words
A composite film of claim 5 in which said pressure-sensitive adhesive comprises an adhesive polymer based on an ester of acrylic acid.
Claim 8
Dependent Claim
59 words
A transparent composite film useful as an inexpensive, nonbrittle, outdoor-facing window pane comprising a. a continuous transparent high-tensile-strength oriented polyethylene terephthalate film; b. a continuous transparent weather-resistant oriented polymethylmethacrylate film; and c. a transparent adhesive layer comprising an adhesive polymer based on an ester of acrylic acid disposed between said support and weather-resistant films to laminate the films together.
Claim 9
Dependent Claim
59 words
A transparent composite film useful as an inexpensive, nonbrittle, outdoor-facing window pane comprising a. a continuous transparent high-tensile-strength oriented polyethylene terephthalate film; b. a continuous transparent weather-resistant oriented polymethylmethacrylate film; and c. a transparent adhesive layer comprising an adhesive polymer based on an ester of acrylic acid disposed between said support and weather-resistant films to laminate the films together.
Claim 10
Dependent Claim
25 words
A composite film of claim 7 in which an absorber of ultraviolet light is dispersed in at least one of said films or adhesive layer.
References Cited (Backward Citations)
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US3100760A
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US3194725A
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US3318975A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |