Use of non-crystalline cellulose as a medicine tablet medium

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C536S057000

Reexamination Certificate

active

07977473

ABSTRACT:
A non crystalline or low crystallinity cellulose is able to be formed into a medicine tablet medium. A method of making a tablet of non crystalline or low crystallinity cellulose comprises providing cellulosic material, adding an effective acid in an amount effective to at least wet the cellulosic material, mixing the cellulosic material and acid under conditions effective to form an essentially uniformly wet condition, letting the mixture sit at ambient conditions for a period of time sufficient to form a viscous fluid, adding water or other diluent in an amount sufficient to lower the acid concentration and to form a slurry, dewatering the slurry, removing any residual acid from the dewatered slurry and forming the tablet.

REFERENCES:
patent: 2758112 (1956-08-01), Waning et al.
patent: 3397198 (1968-08-01), Greidinger et al.
patent: 4058411 (1977-11-01), Bellamy et al.
patent: 4239906 (1980-12-01), Antrim et al.
patent: 4266981 (1981-05-01), Tsao et al.
patent: 4357467 (1982-11-01), Sachetto et al.
patent: 4752579 (1988-06-01), Arena et al.
patent: 5417984 (1995-05-01), Banker et al.
patent: 5597714 (1997-01-01), Farone et al.
patent: 5674507 (1997-10-01), Banker et al.
patent: 6627749 (2003-09-01), Kumar
patent: 2004/0217063 (2004-11-01), Zhang et al.
patent: 2008/0132560 (2008-06-01), Chow et al.
Kunshreshtha et al., “Paracrystalline Lattice Disorder in Cellulose. Reappraisal of the Application of the Two-Phase Hypothesis to the Analysis of Powder X-Ray Diffractograms of Native and Hydrolyzed Cellulosic Materials.” Journal of Polymer Science (1973) vol. 11 pp. 487-497.
Mihranyan et al., “Moisture sorption by cellulose powders of varying crystallinity” International Journal of Pharmaceutics (2004) vol. 269 pp. 433-442.
“Merriam-Webster's Collegiate Dictionary, Tenth Edition”, 1998, p. 1107, Merriam-Webster, Inc.
H. Boerstoel et al., “Liquid crystalline solutions of cellulose in phosphoric acid”, 2001, pp. 7371-7379, vol. 42, Elsevier Science Ltd., www.elsevier.n/locate/polymer.
F. Camacho et al., “Microcrystalline-Cellulose Hydrolysis with Concentrated Sulphuric Acid”,1996,pp. 350-356, J. Chem. Tech. Biotechnol., vol. 67.
Juinn-Chin Hsu et al., “Preparation and Utilization of Cellulose Substrates Regenerated after Treatment with Hydrochloric Acid”, 1991, pp. 1444-1447, vol. 39, J. Agric. Food Chem., American Chemical Society.
Stalbrand et al., “Analysis of Molecular Size Distributions of Cellulose Molecules during Hydrolysis of Cellulose by Recombinant Cellulomonas fimi B-1,4-Glucanasses”, Jul. 1998, pp. 2374-2379, vol. 64, No. 7, Applied and Environmental Microbiology.
Peri et al., “Kinetic Investigation of Cellulase Enzyme Using Non-Crystalline Cellulose and Celllo-Oligosaccharides”, Poster Presentation 1B-60, 27thSymposium on Biotechnology for Fuels and Chemicals, Dept. of Energy, Denver, Co, May 1, 2005.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Use of non-crystalline cellulose as a medicine tablet medium does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Use of non-crystalline cellulose as a medicine tablet medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Use of non-crystalline cellulose as a medicine tablet medium will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2632651

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.