Patent US4288524A successfully refreshed from Google Patents.
US4288524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image-receiving elements utilizing lamellar pigment materials
Assignee: Polaroid Corp
•
Filing: 1980-05-27
•
Granted: 1981-09-08
•
Expires: 2000-05-27
Abstract
Abstract Photographic products having reflective layers which comprise lamellar interference pigments.
Inventors
- 👤 Ruth C. Bilofsky
- 👤 Howard G. Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:30
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C8/00; G03C8/42; G03C8/44; G03C8/48
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
133 words
An image-receiving element for a diffusion transfer product which comprises a support carrying an image-receiving layer and a substantially white layer positioned between said image-receiving layer and said support, said substantially white layer comprising a lamellar pigment dispersed in a matrix material, said lamellar pigment having at least one layer with a geometric thickness within the expression: ##EQU4## where: T is the geometric thickness of the layer, λ represents a wavelength or wavelength range of radiation in the visible region of the spectrum and n is the refractive index of the layer material and is at least 1.7; any layer adjacent said one layer having a geometric thickness of a value also within said expression but comprising a layer material having a refractive index different from the refractive index of said one layer.
Claim 2
Dependent Claim
133 words
An image-receiving element for a diffusion transfer product which comprises a support carrying an image-receiving layer and a substantially white layer positioned between said image-receiving layer and said support, said substantially white layer comprising a lamellar pigment dispersed in a matrix material, said lamellar pigment having at least one layer with a geometric thickness within the expression: ##EQU4## where: T is the geometric thickness of the layer, λ represents a wavelength or wavelength range of radiation in the visible region of the spectrum and n is the refractive index of the layer material and is at least 1.7; any layer adjacent said one layer having a geometric thickness of a value also within said expression but comprising a layer material having a refractive index different from the refractive index of said one layer.
Claim 3
Dependent Claim
23 words
An image-receiving element of claim 1 where said pigment is substantially stable and substantially insoluble in a diffusion transfer aqueous alkaline processing composition.
Claim 4
Dependent Claim
27 words
An image-receiving element of claim 1 where λ of said expression represents a wavelength or wavelength range of radiation between about 4500 A to about 6500 A.
Claim 5
Dependent Claim
27 words
An image-receiving element of claim 1 where λ of said expression represents a wavelength or wavelength range of radiation between about 5000 A to about 5500 A.
Claim 6
Dependent Claim
19 words
An image-receiving element of claim 1 where n of said one layer is between about 2.0 to about 2.8.
Claim 7
Dependent Claim
27 words
An image-receiving element of claim 5 wherein the geometric thickness of said one layer is within the range of from about 450 A to about 700 A.
Claim 8
Dependent Claim
40 words
An image-receiving element of claim 1 where λ of said expression represents a wavelength or wavelength range of radiation between about 5000 A to about 5500 A and n of said one layer is between about 2.0 to about 2.8.
Claim 9
Dependent Claim
16 words
An image-receiving element of claim 1 where said one layer is a layer of titanium dioxide.
Claim 10
Dependent Claim
16 words
An image-receiving element of claim 1 where said one layer is a layer of zirconium dioxide.
Claim 11
Dependent Claim
20 words
An image-receiving element of claim 1 where n of said adjacent layer is lower than n of said one layer.
Claim 12
Dependent Claim
38 words
An image-receiving element of claim 1 where n of said one layer is between about 2.0 to about 2.8 and n of said adjacent layer is less than n of said one layer by at least about 0.3.
Claim 13
Dependent Claim
29 words
An image-receiving element of claim 1 where n of said one layer is between about 2.0 to about 2.8 and n of said adjacent layer is below about 1.5.
Claim 14
Dependent Claim
14 words
An image-receiving element of claim 1 where said pigment comprises three or more layers.
Claim 15
Dependent Claim
28 words
An image-receiving element of claim 1 where said pigment comprises three or more layers and the number of said one layer(s) exceeds the number of said adjacent layer(s).
Claim 16
Dependent Claim
29 words
An image-receiving element of claim 1 where said one layer is a layer of titanium dioxide and said adjacent layer is a layer of strontium fluoride or magnesium fluoride.
Claim 17
Dependent Claim
29 words
An image-receiving element of claim 1 where said one layer is a layer of zirconium dioxide and said adjacent layer is a layer of strontium fluoride or magnesium fluoride.
References Cited (Backward Citations)
US2713004A
Cited
US3071482A
Cited
US3008844A
Cited
US3123489A
Cited
US3123490A
Cited
US3594165A
Cited
US3647437A
Cited
US3928037A
Cited
US4216018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |