Patent US5478705A successfully refreshed from Google Patents.
US5478705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Milling a compound useful in imaging elements using polymeric milling media
Assignee: Eastman Kodak Co
•
Filing: 1994-05-25
•
Granted: 1995-12-26
•
Expires: 2014-05-25
Abstract
Abstract Particles of compound useful in imaging elements are milled using a milling media comprising a polymeric resin. The use of polymeric milling media permits the production of particles having an average particle size less than 1 micron. Further, the resulting particles are free from the contamination resulting from conventional milling media of, for example, glass, ceramic or steel.
Inventors
- 👤 David A. Czekai
- 👤 Dennis E. Smith
- 👤 John F. Bishop
- 👤 Paul E. Woodgate
- 👤 James R. Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:44
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38207; C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0002; G; G03; G03C; G03C1/00; G03C1/005; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/09
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
96 words
A process for the preparation of solid particles of a compound useful in photographic, electrophotographic, or thermal transfer imaging elements having an average particle size of less than 1 micron selected from the group consisting of dye-forming couplers, development inhibitor release couplers (DIR's), development inhibitor anchimeric release couplers (DI(A)R's), masking couplers, filter dyes, thermal transfer dyes, optical brighteners, nucleators, development accelerators, oxidized developer scavengers, ultraviolet radiation absorbing compounds, sensitizing dyes, development inhibitors, antifoggants, bleach accelerators, magnetic particles, lubricants, and matting agents, which comprises milling said compound in the presence of milling media comprising a polymeric resin.
Claim 2
Dependent Claim
96 words
A process for the preparation of solid particles of a compound useful in photographic, electrophotographic, or thermal transfer imaging elements having an average particle size of less than 1 micron selected from the group consisting of dye-forming couplers, development inhibitor release couplers (DIR's), development inhibitor anchimeric release couplers (DI(A)R's), masking couplers, filter dyes, thermal transfer dyes, optical brighteners, nucleators, development accelerators, oxidized developer scavengers, ultraviolet radiation absorbing compounds, sensitizing dyes, development inhibitors, antifoggants, bleach accelerators, magnetic particles, lubricants, and matting agents, which comprises milling said compound in the presence of milling media comprising a polymeric resin.
Claim 3
Dependent Claim
15 words
A process according to claim 1, wherein milling media consists essentially of a polymeric resin.
Claim 4
Dependent Claim
24 words
A process according to claim 1, wherein the milling media consists essentially of a core having adhered thereon a coating of said polymeric resin.
Claim 5
Dependent Claim
45 words
A process according to claim 1, wherein the polymeric resin is selected from the group consisting of cross linked polystyrenes, styrene copolymers, polycarbonates, polyacetals, vinyl chloride polymers and copolymers, polyurethanes, polyamides, fluoropolymers, high density polyethylenes, polypropylenes, cellulose ethers and esters, polyacrylates and silicone containing polymers.
Claim 6
Dependent Claim
17 words
A process according to claim 4, wherein the polymeric resin is polystyrene cross linked with divinyl benzene.
Claim 7
Dependent Claim
13 words
A process according to claim 4, wherein the polymeric resin is a polycarbonate.
Claim 8
Dependent Claim
16 words
A process of claim 1, wherein said milling media has an average size of 0.1-3 mm.
Claim 9
Dependent Claim
19 words
A process according to claim 1, wherein the compound useful in imaging elements is milled in a liquid medium.
Claim 10
Dependent Claim
48 words
A process according to claim 1, wherein the milling takes place in a mill selected from the group consisting of an airjet mill, a roller mill, a ball mill, a media mill an attritor mill a vibratory mill, a planetary mill, a sand mill, and a bead mill.
Claim 11
Dependent Claim
15 words
A process according to claim 9, wherein the mill is a high energy media mill.
Claim 12
Dependent Claim
21 words
A process according to claim 1, wherein the compound is a filter dye, a thermal transfer dye, or a sensitizing dye.
Claim 13
Dependent Claim
17 words
A process according to claim 11, wherein the compound useful in imaging elements is a filter dye.
Claim 14
Dependent Claim
20 words
A process according to claim 1, wherein the particles have an average particle size of less than about 500 nanometers.
References Cited (Backward Citations)
US3104608A
Cited
US3713593A
Cited
US4262851A
Cited
US4404346A
Cited
US4474872A
Cited
US4974368A
Cited
US4940654A
Cited
US5066486A
Cited
US5066335A
Cited
EP0498482A2
Cited
US5145684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |