Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
2004-05-26
2008-08-26
Le, H. T (Department: 1794)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C071S064070, C071S064110, C524S722000
Reexamination Certificate
active
07416785
ABSTRACT:
An encapsulated particle includes a core particle. The core particle includes a fertilizer selected from the group of nitrogen, phosphate, potash, and sulfur, and combinations thereof. The core particle may also include herbicides, insecticides, and fungicides. The encapsulated particle also includes a polyurethane layer disposed about the core particle. The polyurethane layer includes the reaction product of an aromatic isocyanate component and a polyol that is reactive with the aromatic isocyanate component. The aromatic isocyanate component includes methylene diphenyl diisocyanate, toluene diisocyanate, and mixtures thereof. The polyol that is reactive with the aromatic isocyanate component is derived from an aromatic amine-based initiator and includes a toluene diamine. The aromaticity of the aromatic isocyanate component and the polyol serves to insure complete miscibility between the aromatic isocyanate and the polyol thereby forming the polyurethane layer without defects preventing water from permeating the polyurethane layer and dissolving the core particle.
REFERENCES:
patent: 3259482 (1966-07-01), Hansen
patent: 3264089 (1966-08-01), Hansen
patent: 3475154 (1969-10-01), Kato
patent: 3671470 (1972-06-01), Case
patent: 3875074 (1975-04-01), Vassiliades et al.
patent: 4370463 (1983-01-01), Schafer
patent: 4469502 (1984-09-01), Heller et al.
patent: 4681806 (1987-07-01), Matkan et al.
patent: 4711659 (1987-12-01), Moore
patent: 4738989 (1988-04-01), Smith
patent: 4772490 (1988-09-01), Kogler et al.
patent: 4804403 (1989-02-01), Moore
patent: 4969947 (1990-11-01), Moore
patent: 5374292 (1994-12-01), Detrick et al.
patent: 5525641 (1996-06-01), White et al.
patent: 5538531 (1996-07-01), Hudson et al.
patent: 5547486 (1996-08-01), Detrick et al.
patent: 5652196 (1997-07-01), Luthra et al.
patent: 5803946 (1998-09-01), Petcavich et al.
patent: 5851261 (1998-12-01), Markusch et al.
patent: 6100308 (2000-08-01), Guettes et al.
patent: 6176891 (2001-01-01), Komoriya et al.
patent: 6231633 (2001-05-01), Hirano et al.
patent: 6316513 (2001-11-01), McCullough et al.
patent: 6358296 (2002-03-01), Markusch et al.
patent: 6364925 (2002-04-01), Markusch et al.
patent: 6410801 (2002-06-01), Hinz et al.
patent: 6663686 (2003-12-01), Geiger et al.
patent: 6914117 (2005-07-01), Bleys et al.
patent: 2003/0033843 (2003-02-01), Tabel
patent: 2004/0016276 (2004-01-01), Wynnyk et al.
patent: 2004/0020254 (2004-02-01), Wynnyk et al.
patent: 2004/0045331 (2004-03-01), Geiger et al.
patent: 2149075 (1996-11-01), None
patent: 2272480 (1999-11-01), None
patent: 0 867 422 (1998-09-01), None
patent: WO 98/29360 (1998-07-01), None
patent: WO 02/00573 (2002-01-01), None
patent: WO2005/118509 (2005-12-01), None
BASF Corporation
Borrego Fernando A.
Le H. T
LandOfFree
Polyurethane-encapsulated particle comprising polyol derived... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyurethane-encapsulated particle comprising polyol derived..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyurethane-encapsulated particle comprising polyol derived... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4010367