Ingo H Leubner

US Patent:

7019171, Mar 28, 2006

Filed:

Dec 2, 2004

Appl. No.:

11/002818

Inventors:

Thaddeus Prusik - Stroudsburg PA, US
Dawn Smith - Martinsville NJ, US
Ingo Leubner - Penfield NY, US

Assignee:

Temptime Corporation - Morris Plains NJ

International Classification:

C07C 273/18

US Classification:

564 61

Abstract:

Precipitation of polyacetylenic agents can be effected with control of a particle size parameter such as mean size or spread, by mixing a warm solution of the acetylenic agent with a cold precipitation fluid and appropriate selection of a constituent of the cold precipitation fluid and/or of the temperature conditions and collecting the precipitated acetylenic agent. Precipitation additives such as nitrocellulose or gelatin can usefully be employed. Solvents such as aqueous methanol and ethyl 3-ethoxypropionate can be useful. Polyacetylenic agents, e. g. substituted diacetylenics are useful to provide visual changes in condition-monitoring indicators such as time-temperature indicators, “TTIs”, useful as freshness indicators for radiation exposure monitoring and for other purposes. Controlled, small and/or consistent particle sizes of such polyacetylenic agents are helpful in providing consistent commercial properties, especially in inks in which they may be formulated.

US Patent:

7161023, Jan 9, 2007

Filed:

Jul 28, 2004

Appl. No.:

10/900448

Inventors:

Thaddeus Prusik - Stroudsburg PA, US
Dawn E. Smith - Martinsville NJ, US
Ingo H. Leubner - Penfield NY, US
Wesley A. Olmsted - Grafton WI, US

Assignee:

Temptime Corporation - Morris Plains NJ

International Classification:

C07C 269/08
G01N 37/00

US Classification:

560158, 436 56

Abstract:

A system for recovering a diacetylenic monomer shelf life monitoring compound of reduced particle size and narrow size distribution range which comprises quenching a solution of the monomer by mixing the solution in a lower temperature quenching fluid having a base temperature which is at least about 30 C. below the nominal temperature at which the monomer compound recrystallizes from solution, the mixing being effected in such a manner as to limit the resulting quenching mixture temperature to one which is not higher than a maximum of about 15 C. above the quenching fluid base temperature.

US Patent:

52197212, Jun 15, 1993

Filed:

Apr 16, 1992

Appl. No.:

7/869679

Inventors:

Roger L. Klaus - Rochester NY
Ingo H. Leubner - Penfield NY
Michael E. Ryan - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 134

US Classification:

430569

Abstract:

This invention provides a method of preparing a silver halide photographic emulsion which comprises adding to the silver halide emulsion before or during sensitization a non-labile chalcogen compound represented by Formula I: R. sup. 1 --X. sup. 1 --X. sup. 2 --R. sup. 2 (Formula I) It further provides a silver halide photographic emulsion prepared by the above method.

US Patent:

49026119, Feb 20, 1990

Filed:

Jan 6, 1989

Appl. No.:

7/294035

Inventors:

Ingo H. Leubner - Rochester NY
Weimer W. White - Rochester NY

International Classification:

G03C 106

US Classification:

430567

Abstract:

Improved reproducibility is obtained when silver halide emulsions containing iridium are prepared using a nitric acid solution of an iridium (IV) salt.

US Patent:

53895070, Feb 14, 1995

Filed:

Dec 31, 1992

Appl. No.:

7/999450

Inventors:

Keath T. Chen - Rochester NY
Ingo H. Leubner - Penfield NY
Robert A. Arcus - Penfield NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 1035

US Classification:

430567

Abstract:

A reversal photographic element having both a light sensitive layer containing both surface latent image forming silver halide 9rains and internal latent image forming silver halide grains. A method of processing elements of the foregoing type is also provided. The elements exhibit good push processing characteristics with low loss of D. sub. max.