| (19) |
 |
|
(11) |
EP 0 362 699 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
13.03.1991 Bulletin 1991/11 |
| (43) |
Date of publication A2: |
|
11.04.1990 Bulletin 1990/15 |
| (22) |
Date of filing: 28.09.1989 |
|
| (51) |
International Patent Classification (IPC)5: G03C 1/035 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
03.10.1988 US 252723
30.05.1989 US 358999
|
| (71) |
Applicant: EASTMAN KODAK COMPANY |
|
Rochester,
New York 14650-2201 (US) |
|
| (72) |
Inventors: |
|
- Zola, Philip Joseph
c/o EASTMAN KODAK COMPANY
Rochester
New York 14650 (US)
- Bryant, Roger Anthony
c/o EASTMAN KODAK COMPANY
Rochester
New York 14650 (US)
|
| (74) |
Representative: Brandes, Jürgen, Dr. rer. nat. et al |
|
Wuesthoff & Wuesthoff
Patent- und Rechtsanwälte
Schweigerstrasse 2
81541 München
81541 München (DE) |
|
| |
|
| (54) |
Reduced dispersity high aspect ratio tabular grain emulsions |
(57) A high aspect ratio silver bromoiodide tabular grain emulsion is disclosed in which
tabular grains having a thickness of less than 0.3 µm account for greater than 50
percent of the projected area of the total grain population and have an average aspect
ratio of greater than 12. The coefficient of variation of the total grain population
is unusually low when the high average aspect ratio of the tabular grains is taken
into account.