Patent US3790389A successfully refreshed from Google Patents.
US3790389A
Expired / Lapsed
US
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Photoxidizable compositions
Assignee: Monsanto Co
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Filing: 1971-02-16
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Granted: 1974-02-05
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Expires: 1991-02-16
Abstract
Abstract This invention relates to light sensitive compositions comprising a photosensitizer and a substrate useful in preparing photographic images.
Inventors
- 👤 R Heimsch
- 👤 E Reaville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:31
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/0045; G03C; G03C1/00; G03C1/72; G03C1/73; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/121
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
13 words
The method of claim 1 in which the photosensitizer is an aryl porphyrin.
Claim 2
Dependent Claim
11 words
The method of claim 1 in which the photosensitizer is tetraphenylporphin.
Claim 3
Independent Claim
77 words
A method of obtaining an image which comprises selectively photooxidizing a coated surface by contact with oxygen and exposure to light with a replica of an image interposed between the light source and the coated surface to an extent for an uptake of at least about 10 9 moles of oxygen per square centimeter of coated surface, the coated surface comprising a photochemically oxidizable substrate having aliphatic carbon-to-carbon unsaturation, and an oxidation photosensitizer, and developing and image.
Claim 4
Dependent Claim
24 words
A method as described in claim 4 in which a visible image is formed by treatment of the complete coated surface with a dye.
Claim 5
Dependent Claim
25 words
The method of claim 4 in which a visible image is formed by absorbtion of an alcohol soluble dye in areas which have been oxidized.
Claim 6
Dependent Claim
21 words
The method of claim 4 in which a relief image is formed by dissolving a portion of the coating with solvent.
Claim 7
Dependent Claim
18 words
The method of claim 4 in which portions of the image which have not been oxidized are dissolved.
Claim 8
Dependent Claim
21 words
The method of claim 4 in which the photosensitizer is substantially unchanged and the coated surface comprises a polymer of diolefin.
Claim 9
Independent Claim
66 words
A method of obtaining an image which comprises exposing imagewise to light in the presence of oxygen a layer comprising a photosensitizer and a photochemically oxidizable polymer having aliphatic carbon-to-carbon unsaturation, causing addition of oxygen to said polymer forming chemical bonds therewith in exposed areas while otherwise substantially retaining the structure of such polymer, thereby forming a latent image in said layer, and developing said image.
Claim 10
Dependent Claim
19 words
The method of claim 5 in which a continuous tone transparency is used to produce a continuous tone picture.
Claim 11
Dependent Claim
56 words
The process of developing a latent image which comprises providing a layer containing a polymer having carbon-to-carbon double bonds with a latent image composed of allylic hydroperoxy groupings in some areas while other areas lack such groupings, and developing such image by treatment with a coloring materiAl which has selective affinity for one of such areas.
Claim 12
Dependent Claim
58 words
The process of developing a latent image which comprises providing a layer containing a polymer having aliphatic carbon-to-carbon double bonds with a latent image composed of allylic hydroperoxy groupings in some areas while other areas differ therefrom essentially only in lacking such groupings, and developing such image by selectively dissolving one of such areas with a solvent therefor.
Claim 13
Dependent Claim
19 words
The process of claim 13 in which the portion lacking such groupings is dissolved with an aliphatic hydrocarbon solvent.
Claim 14
Dependent Claim
79 words
The process of obtaining an image which comprises exposing to light imagewise through a multi-color transparency in the presence of oxygen a layer comprising a solid polymer with aliphatic carbon-to-carbon double bond unsaturation and a panchromatic photooxidation photosensitizer, thereby causing oxidation to chemically bond oxygen to areas of the layer struck by light passed through various colors of the transparency to provide a latent image in said layer corresponding to the image of said transparency, and developing said image.
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |