US4066814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent supports for photographic products
Assignee: Polaroid Corp
•
Filing: 1975-12-08
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Granted: 1978-01-03
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Expires: 1995-12-08
Abstract
Abstract Transparent elements useful as supports for photographic image-carrying and/or image-recording layers are provided comprising a polyester film base having an anti-reflection coating on one surface. Image-carrying and/or image-recording layers may be coated on the opposed surface. The polyester film base of the transparent element has an index of refraction of at least 1.6, and the anti-reflection coating comprises a fluorinated polymer and has an optical thickness of a quarter wave. An isocyanate in the anti-reflection coating or between said coating and the polyester film base increases the abrasion resistance of the fluorinated polymer anti-reflection coating.
Inventors
- 👤 Charles K. Chiklis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:59
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; Y; Y10; Y10S; Y10S430/00; Y10S430/142; Y10S430/151; Y10S430/162; Y10T; Y10T428/00; Y10T428/26; Y10T428/261; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/269; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31565; Y10T428/31573; Y10T428/3158; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
98 words
A transparent element comprising a polyester film base having coated directly on at least one surface thereof an anti-reflection coating comprising a fluorinated polymer, said anti-reflection coating having an index of refraction of about 1.3 to 1.45 and a quarter wave optical thickness, the index of refraction of said anti-reflection coating being at least 0.2 less than that of said polyester film base, said element including an isocyanate in said coating or between said coating and said transparent polyester support, said isocyanate being present in a quantity effective to increase the abrasion resistance of said fluorinated polymer coating.
Claim 2
Dependent Claim
98 words
A transparent element comprising a polyester film base having coated directly on at least one surface thereof an anti-reflection coating comprising a fluorinated polymer, said anti-reflection coating having an index of refraction of about 1.3 to 1.45 and a quarter wave optical thickness, the index of refraction of said anti-reflection coating being at least 0.2 less than that of said polyester film base, said element including an isocyanate in said coating or between said coating and said transparent polyester support, said isocyanate being present in a quantity effective to increase the abrasion resistance of said fluorinated polymer coating.
Claim 3
Dependent Claim
24 words
A transparent element as defined in claim 1 wherein said isocyanate is present in a quantity of about 1 to 2 mg./ft. 2 .
Claim 4
Dependent Claim
14 words
A transparent element as defined in claim 1 wherein said isocyanate is a polyisocyanate.
Claim 5
Dependent Claim
31 words
A transparent element as defined in claim 1 wherein said quantity of said isocyanate is also effective to increase the adhesion of said fluorinated polymer coating to said polyester film base.
Claim 6
Dependent Claim
28 words
A transparent element as defined in claim 1 wherein said isocyanate is present in said quarter-wave coating in a concentration of about 1 to 2 mg./ft. 2 .
Claim 7
Dependent Claim
26 words
A transparent element as defined in claim 1 wherein about 1 to 2 mg./ft. 2 of said isocyanate is coated between said support and said coating.
Claim 8
Dependent Claim
30 words
A transparent element as defined in claim 1 wherein said anti-reflection coating is present on one surface and the other surface of said polyester film base carries a subbing layer.
Claim 9
Dependent Claim
14 words
A transparent element as defined in claim 1 wherein said polyester is polyethylene terephthalate.
Claim 10
Dependent Claim
24 words
A transparent element as defined in claim 1 wherein each surface of said organic polymeric film base has coated directly thereon said anti-reflection coating.
Claim 11
Dependent Claim
22 words
A transparent element as defined in claim 1 wherein said polyester film base has a thickness of about 2 to 11 mils.
Claim 12
Dependent Claim
17 words
A transparent element as defined in claim 1 wherein said anti-reflection coating includes a vinylidene fluoride copolymer.
Claim 13
Dependent Claim
20 words
A transparent element as defined in claim 1 wherein said anti-reflection coating includes a copolymer of vinylidene fluoride and chlorotrifluoroethylene.
Claim 14
Dependent Claim
20 words
A transparent element as defined in claim 1 wherein said anti-reflection coating includes a copolymer of vinylidene fluoride and tetrafluoroethylene.
Claim 15
Dependent Claim
20 words
A transparent element as defined in claim 1 wherein said anti-reflection coating includes a copolymer of vinylidene fluoride and hexafluoropropylene.
Claim 16
Dependent Claim
15 words
A transparent element as defined in claim 1 wherein said anti-reflection coating includes polymethyl methacrylate.
Claim 17
Dependent Claim
23 words
A transparent element as defined in claim 1 wherein said anti-reflection coating has an optical thickness of about 0.08 to about 0.2 micron.
Claim 18
Dependent Claim
23 words
A transparent element as defined in claim 1 wherein said anti-reflection coating has a physical thickness of about 0.09 to about 0.11 micron.
Claim 19
Dependent Claim
110 words
A transparent element comprising a polyethylene terephthalate film base, said film base having an index of refraction of at least 1.6 and having coated directly on one surface thereof an anti-reflection coating comprising a copolymer of vinylidene fluoride, said anti-reflection coating having a quarter wave optical thickness, a physical thickness of about 0.09 to about 0.11 micron, and an index of refraction at least about 0.20 less than the index of refraction of said polyethylene terephthalate, said element including an isocyanate in said coating or between said coating and said transparentpolyester support, said isocyanate being present in a quantity effective to increase the abrasion resistance of said fluorinated polymer coating.
Claim 20
Dependent Claim
110 words
A transparent element comprising a polyethylene terephthalate film base, said film base having an index of refraction of at least 1.6 and having coated directly on one surface thereof an anti-reflection coating comprising a copolymer of vinylidene fluoride, said anti-reflection coating having a quarter wave optical thickness, a physical thickness of about 0.09 to about 0.11 micron, and an index of refraction at least about 0.20 less than the index of refraction of said polyethylene terephthalate, said element including an isocyanate in said coating or between said coating and said transparentpolyester support, said isocyanate being present in a quantity effective to increase the abrasion resistance of said fluorinated polymer coating.
Claim 21
Dependent Claim
33 words
A transparent element as defined in claim 18 wherein said polyethylene terephthalate includes a small quantity of a pigment effective to control light-piping by internal reflection of light incident upon an edge thereof.
Claim 22
Dependent Claim
16 words
A transparent element as defined in claim 19 wherein said optical thickness is about 1400 Angstroms.
Claim 23
Dependent Claim
24 words
A transparent element as defined in claim 18 wherein said isocyanate is present in a quantity of about 1 to 2 mg./ft. 2 .
Claim 24
Dependent Claim
14 words
A transparent element as defined in claim 18 wherein said isocyanate is a polyisocyanate.
Claim 25
Dependent Claim
31 words
A transparent element as defined in claim 18 wherein said quantity of said isocyanate is also effective to increase the adhesion of said fluorinated polymer coating to said polyester film base.
Claim 26
Dependent Claim
28 words
A transparent element as defined in claim 18 wherein said isocyanate is present in said quarter-wave coating in a concentration of about 1 to 2 mg./ft. 2 .
Claim 27
Dependent Claim
110 words
A transparent element comprising a polyethylene terephthalate film base, said film having an index of refraction of at least 1.6 and having coated directly on both surfaces thereof an anti-reflection coating comprising a copolymer of vinylidene fluoride, said anti-reflection coating having a quarter wave optical thickness, a physical thickness of about 0.09 to about 0.11 micron, and an index of refraction at least about 0.20 less than the index of refraction of said polyethylene terephthalate, said element including an isocyanate in said coating or between said coating and said transparent polyester support, said isocyanate being present in a quantity effective to increase the abrasion resistance of said fluorinated polymer coating.
Claim 28
Dependent Claim
110 words
A transparent element comprising a polyethylene terephthalate film base, said film having an index of refraction of at least 1.6 and having coated directly on both surfaces thereof an anti-reflection coating comprising a copolymer of vinylidene fluoride, said anti-reflection coating having a quarter wave optical thickness, a physical thickness of about 0.09 to about 0.11 micron, and an index of refraction at least about 0.20 less than the index of refraction of said polyethylene terephthalate, said element including an isocyanate in said coating or between said coating and said transparent polyester support, said isocyanate being present in a quantity effective to increase the abrasion resistance of said fluorinated polymer coating.
Claim 29
Independent Claim
111 words
The method which comprises coating directly on a polyester self-supporting film having an index of refraction of at least 1.6, a solution comprising an organic solvent and at least one fluorinated polymer dissolved therein at a coverage which will provide a fluorinated polymer layer having a quarter wave optical dry thickness, and drying said coating by evaporating said solvent at an elevated temperature, the index of refraction of said coating being about 1.3 to 1.45 and at least 0.2 less than that of said polyester film, said coating solution being applied at room temperature and including an isocyanate in a quantity effective to increase the abrasion resistance of said fluorinated polymer.
Claim 30
Independent Claim
111 words
The method which comprises coating directly on a polyester self-supporting film having an index of refraction of at least 1.6, a solution comprising an organic solvent and at least one fluorinated polymer dissolved therein at a coverage which will provide a fluorinated polymer layer having a quarter wave optical dry thickness, and drying said coating by evaporating said solvent at an elevated temperature, the index of refraction of said coating being about 1.3 to 1.45 and at least 0.2 less than that of said polyester film, said coating solution being applied at room temperature and including an isocyanate in a quantity effective to increase the abrasion resistance of said fluorinated polymer.
Claim 31
Dependent Claim
13 words
The method as defined in claim 26 wherein said polyester is polyethylene terephthalate.
Claim 32
Dependent Claim
20 words
The method as defined in claim 26 wherein said polyester film has a thickness of about 2 to 11 mils.
Claim 33
Dependent Claim
16 words
The method as defined in claim 26 wherein said coating solution includes a vinylidene fluoride copolymer.
Claim 34
Dependent Claim
19 words
The method as defined in claim 26 wherein said coating solution includes a copolymer of vinylidene fluoride and chlorotrifluoroethylene.
Claim 35
Dependent Claim
19 words
The method as defined in claim 26 wherein said coating solution includes a copolymer of vinylidene fluoride and tetrafluoroethylene.
Claim 36
Dependent Claim
19 words
The method as defined in claim 26 wherein said coating solution includes a copolymer of vinylidene fluoride and hexafluoropropylene.
Claim 37
Dependent Claim
14 words
The method as defined in claim 26 wherein said coating solution includes polymethyl methacrylate.
Claim 38
Dependent Claim
13 words
The method as defined in claim 26 wherein said isocyanate is a polyisocyanate.
Claim 39
Dependent Claim
31 words
The method as defined in claim 26 wherein said said isocyanate is provided by including in said coating solution a blocked isocyanate which releases said isocyanate at said elevated drying temperature.
Claim 40
Dependent Claim
33 words
The method as defined in claim 26 wherein said isocyanate is present in said coating solution in a concentration effective to provide a coverage of about 1 to 2 mg. per square foot.
Claim 41
Dependent Claim
12 words
The method as defined in claim 26 wherein said isocyanate is methylene-bis-(4-phenylisocyanate).
Claim 42
Dependent Claim
17 words
The method as defined in claim 35 wherein said blocked isocyanate is a p-chlorophenol derivative of methylene-bis-(4-phenylisocyanate).
Claim 43
Dependent Claim
13 words
A transparent element as defined in claim 1 wherein said isocyanate is methylene-bis-(4-phenylisocyanate).
Claim 44
Dependent Claim
33 words
A transparent element as defined in claim 1 wherein said isocyanate is present in said fluorinated polymer coating at a concentration of about 0.5 to 8 percent by weight of said polymer coating.
Claim 45
Dependent Claim
31 words
A transparent element as defined in claim 1 wherein said isocyanate is coated at a concentration of about 1 mg./ft. 2 between said polyester film base and said fluorinated polymer coating.
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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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |