The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 1999
Filed:
Feb. 07, 1997
Applicant:
Inventors:
Christian Collette, Paris, FR;
Manuel Hidalgo, Paris, FR;
Andre Kowalik, Gouvieux, FR;
Emmanuel Puchois, Paris, FR;
Assignee:
Elf Atochem, S.A., Puteaux, FR;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428407 ; 525344 ;
Abstract
Shell/core distortion-resistant particulates of a partially crosslinked superabsorbent polymer, the gradient of partial crosslinking of which being to such extent that the shells are harder and less flexible than the cores thereof, have a capacity to absorb 0.9% saline water of at least 50 g/g and the modulus of which is at least 35,000 Pa; a bed of a saline water gel of the subject particulates has a saline water absorption of at least 20 g/g and a porosity of at least 500 g.