US3925076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light sensitive compositions and products
Assignee: Monsanto Co
•
Filing: 1973-11-14
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Granted: 1975-12-09
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Expires: 1993-11-14
Abstract
Abstract This invention relates to light sensitive compositions comprising a photosensitizer and a substrate useful in preparing photographic images.
Inventors
- 👤 Robert A Heimsch
- 👤 Eric T Reaville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:56
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/0045; G03C; G03C1/00; G03C1/72; G03C1/73; G03F7/039; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
THE PROCESS OF PASSING A FLUID THROUGH A LAYER IN IMAGEWISE MANNER WHICH COMPRISES PROVIDING A LAYER HAVING A LATENT IMAGE COMPRISED OF A POLYMER HAVING ALIPHATIC CARBON-TO-CARBON DOUBLE BONDS AND HAVING OXIDIZED PORTIONS HAVING CHEMICALLY BONDED OXYGEN, AND NON-OXIDIZED PORTIONS AND APLYING A FLUID TO A SURFACE OF THE LAYER WHICH FLUID SELECTIVELY PENETRATES THROUGH ONE OF SUCH PORTIONS AND PERMITTING SUCH FLUID TO PENETRATE THROUGH SUCH LAYER SELECTIVELY.
Claim 2
Dependent Claim
70 words
THE PROCESS OF PASSING A FLUID THROUGH A LAYER IN IMAGEWISE MANNER WHICH COMPRISES PROVIDING A LAYER HAVING A LATENT IMAGE COMPRISED OF A POLYMER HAVING ALIPHATIC CARBON-TO-CARBON DOUBLE BONDS AND HAVING OXIDIZED PORTIONS HAVING CHEMICALLY BONDED OXYGEN, AND NON-OXIDIZED PORTIONS AND APLYING A FLUID TO A SURFACE OF THE LAYER WHICH FLUID SELECTIVELY PENETRATES THROUGH ONE OF SUCH PORTIONS AND PERMITTING SUCH FLUID TO PENETRATE THROUGH SUCH LAYER SELECTIVELY.
Claim 3
Dependent Claim
35 words
The process of claim 1 in which the layer has been exposed imagewise to light in the presence of oxygen to an extent sufficient that oxidation has occured imagewise throughout the thickness of the layer.
Claim 4
Dependent Claim
24 words
The process of claim 1 in which the fluid contains a coloring material and image is produced on a material adjacent to said layer.
Claim 5
Dependent Claim
16 words
The process of claim 1 in which an alcohol penetrates through oxidized portions of said layer.
Claim 6
Dependent Claim
19 words
The process of claim 1 in which the fluid penetrates imagewise through the layer and etches a metal surface.
Claim 7
Independent Claim
84 words
A METHOD OF OBTAINING IMAGES 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 APPLYING A FLUID TO THE SURFACE OF THE LAYER IN WHICH FLUID SELECTIVELY PENETRATES IMAGEWISE THROUGH SAID LAYER TO PRODUCE AN IMAGE.
Claim 8
Independent Claim
84 words
A METHOD OF OBTAINING IMAGES 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 APPLYING A FLUID TO THE SURFACE OF THE LAYER IN WHICH FLUID SELECTIVELY PENETRATES IMAGEWISE THROUGH SAID LAYER TO PRODUCE AN IMAGE.
Claim 9
Dependent Claim
21 words
The method of claim 6 in which the photosensitizer is an aryl porphyrin and the oxidizable polymer is a polymer diolefin.
Claim 10
Dependent Claim
19 words
The method of claim 6 in which the photosensitizer is tetraphenylporphin and the oxidizable polymer is a styrene/butadiene copolymer.
References Cited (Backward Citations)
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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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |