Patent US5055379A successfully refreshed from Google Patents.
US5055379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoresist dichromate composition containing gelatin coated particles
Assignee: Eastman Kodak Co
•
Filing: 1990-03-19
•
Granted: 1991-10-08
•
Expires: 2010-03-19
Abstract
Abstract A negative-working photoresist composition comprising, in admixture, (a) dye-loaded or dye-precursor-loaded polymeric particles individually covered with a layer of gelatin that is covalently bonded thereto and (b) a radiation-sensitive dichromate is useful in the preparation of continuous tone dyed imaging elements such as color filter arrays for use in solid state color image sensing devices.
Inventors
- 👤 Pranab Bagchi
- 👤 Raymond F. Reithel
- 👤 Tsang J. Chen
- 👤 Steven Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0005; G03F7/0007; G03F7/004; G03F7/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
31 words
A negative-working photoresist composition comprising in admixture (a) dye-loaded or dye precursor-loaded polymeric particles individually covered with a layer of gelatin that is covalently bonded thereto and (b) a radiation-sensitive dichromate.
Claim 2
Dependent Claim
31 words
A negative-working photoresist composition comprising in admixture (a) dye-loaded or dye precursor-loaded polymeric particles individually covered with a layer of gelatin that is covalently bonded thereto and (b) a radiation-sensitive dichromate.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein said polymeric particles have a mean diameter from 10 to 10 4 nm.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein the layer of gelatin has a thickness from 10 to 60 nm.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein said polymeric particles are derived from butylacrylate, chloromethyl styrene and styrenesulfonic acid sodium salt.
Claim 6
Dependent Claim
11 words
The composition of claim 1 wherein said dichromate is ammonium dichromate.
Claim 7
Dependent Claim
18 words
The composition of claim 1, wherein said polymer particles have a mean diameter between 10 and 500 nm.
Claim 8
Dependent Claim
14 words
The composition of claim 1, wherein said polymer particles comprise ethylenically linked divalent monomers.
Claim 9
Dependent Claim
31 words
The composition of claim 1 wherein the polymeric particles contain at least 0.5 percent by weight of carboxylic acid groups, active halogen containing groups, aldehyde groups, aziridene groups or isocyanate groups.
Claim 10
Dependent Claim
34 words
The composition of claim 8 wherein said composition contains a gel grafting agent and said gel grafting agent is selected from the group consisting of a carbamoylonium salt, a dication ether or a carbodiimide.
Claim 11
Dependent Claim
30 words
The composition of claim 1 wherein the loaded dye is selected from the group consisting of: azo anilines, azo pyridines, azo pyrazolones, merocyanines, methines, arylidenes, quinonimines, anthraquinones, naphthoquinones and quinonaphthalones.
Claim 12
Dependent Claim
24 words
The composition of claim 1 wherein the polymeric material is derived from a polymer that has a glass transition temperature less than 25° C.
Claim 13
Dependent Claim
24 words
The composition of claim 1 wherein the weight ratio of said polymer particle to gelatin is from 1 to 2 to 2 to 1.
Claim 14
Dependent Claim
13 words
The composition of claim 1 wherein the dye-precursor is a photographic color coupler.
Claim 15
Dependent Claim
14 words
The composition of claim 1 wherein the dyed particles comprise a copolymerized dye monomer.
Claim 16
Dependent Claim
16 words
The composition of claim 1 wherein the dyed particle is a dye developed polymeric coupler particle.
Claim 17
Dependent Claim
15 words
The composition of claim 1 wherein the dye precursor is a dye developable polymeric coupler.
References Cited (Backward Citations)
US2716060A
Cited
US2704253A
Cited
US2716061A
Cited
US4089687A
Cited
US4443514A
Cited
US4764670A
Cited
EP0307855A2
Cited
EP0307856A2
Cited
US4855219A
Cited
US4942103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |