Structure having balanced pH profile

Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C604S370000, C523S105000

Reexamination Certificate

active

07317135

ABSTRACT:
Disclosed is an absorbent structure comprising an acidic or basic water-swellable, water-insoluble polymer, a basic or acidic second material, and, optionally, a buffering agent, wherein the absorbent structure exhibits desirable absorbent properties. Specifically, the present invention relates to an absorbent structure having the ability to absorb a large quantity of liquid while maintaining a substantially desired and balanced pH profile on or along the upper surface of the absorbent structure. The absorbent structure is useful in disposable absorbent products, such as those disposable absorbent products that are used to absorb body liquid.

REFERENCES:
patent: 2586883 (1952-02-01), Stroh et al.
patent: 3558744 (1971-01-01), Michaels et al.
patent: 3669103 (1972-06-01), Harper et al.
patent: 3794034 (1974-02-01), Jones
patent: 3962158 (1976-06-01), Mima et al.
patent: 4104214 (1978-08-01), Meierhoefer
patent: 4200557 (1980-04-01), Chatterjee et al.
patent: 4440541 (1984-04-01), Berke
patent: 4454268 (1984-06-01), Otey et al.
patent: 4657537 (1987-04-01), Zimmerer
patent: 4685909 (1987-08-01), Berg et al.
patent: 4771105 (1988-09-01), Shirai et al.
patent: 4818598 (1989-04-01), Wong
patent: 4833222 (1989-05-01), Siddall et al.
patent: 4842593 (1989-06-01), Jordan et al.
patent: 5011864 (1991-04-01), Nielsen et al.
patent: 5051185 (1991-09-01), Watanabe et al.
patent: 5126382 (1992-06-01), Hollenberg
patent: 5173521 (1992-12-01), Ishino
patent: 5258421 (1993-11-01), Lorenz et al.
patent: 5264471 (1993-11-01), Chmelir
patent: 5284936 (1994-02-01), Donachy et al.
patent: 5286770 (1994-02-01), Bastioli et al.
patent: 5340853 (1994-08-01), Chmelir et al.
patent: 5364380 (1994-11-01), Tanzer et al.
patent: 5420197 (1995-05-01), Lorenz et al.
patent: 5461085 (1995-10-01), Nagatomo et al.
patent: 5482843 (1996-01-01), Brzezinski
patent: 5487895 (1996-01-01), Dapper et al.
patent: 5496933 (1996-03-01), Kelkenberg
patent: 5550189 (1996-08-01), Qin et al.
patent: 5578661 (1996-11-01), Fox et al.
patent: 5610208 (1997-03-01), Dairoku et al.
patent: 5612411 (1997-03-01), Gross
patent: 5652194 (1997-07-01), Dyer et al.
patent: 5693707 (1997-12-01), Cheng et al.
patent: 5807364 (1998-09-01), Hansen
patent: 5856410 (1999-01-01), Carrico et al.
patent: 6639120 (2003-10-01), Wallajapet et al.
patent: 6951895 (2005-10-01), Qin et al.
patent: 7012105 (2006-03-01), Wallajapet et al.
patent: 2002/0058097 (2002-05-01), Beyer et al.
patent: 2002/0147433 (2002-10-01), McOsker et al.
patent: 2003/0125684 (2003-07-01), Qin
patent: 0 763 364 (1997-03-01), None
patent: WO 91/15250 (1991-10-01), None
patent: WO 95/22358 (1995-08-01), None
patent: WO 96/15163 (1996-05-01), None
patent: WO 96/15180 (1996-05-01), None
patent: WO 96/17681 (1996-06-01), None
Campbell, Neil A.,Biology, The Benjamin/Cummings Publishing Company, Inc., 1987, pp. 45-48 and G-3.
Chang, Raymond,Chemistry, Second Edition, Random House. Inc., New York, 1984, pp. 141, 247 & 533.
Chen, Chyi-Cheng, “Synthetic and Natural Polymers,” Absorbency—Textile Science and Technology 7, edited by Pronoy K. Chatterjee, published by Elsevier, New York, 1985, p. 206.
Lide, David R., Ph. D., Editor,CRC Handbook of Chemistry&Physics, 74th Edition, CRC Press, Ann Arbor, Michigan, 1993-1994, pp. 7-1, 7-3, 7-30, 8-17, 8-18, 16-24, 16-25, and 16-26.
Stoll, Vincent S. and John S. Blanchard, “Buffers: Principles and Practice,”Methods in Enzymology; vol. 182,Guide to Protein Purification, edited by Murray P. Deutscher, Academic Press, Inc., 1990, pp. 24-26.

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

Structure having balanced pH profile does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Structure having balanced pH profile, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure having balanced pH profile will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2789248

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