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:
May. 22, 2018
Filed:
Aug. 05, 2015
Applicant:
E I Du Pont DE Nemours and Company, Wilmington, DE (US);
Inventors:
Mikhail R Levit, Glen Allen, VA (US);
Dariusz Wlodzimierz Kawka, Midlothian, VA (US);
Assignee:
E I DU PONT DE NEMOURS AND COMPANY, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 3/12 (2006.01); D21H 19/84 (2006.01); B32B 27/10 (2006.01); D21H 13/26 (2006.01); D21H 19/12 (2006.01); D21H 23/70 (2006.01); D21H 19/24 (2006.01); D21H 19/30 (2006.01); D21H 19/82 (2006.01);
U.S. Cl.
CPC ...
D21H 19/84 (2013.01); B32B 3/12 (2013.01); B32B 27/10 (2013.01); D21H 13/26 (2013.01); D21H 19/12 (2013.01); D21H 19/24 (2013.01); D21H 19/30 (2013.01); D21H 19/824 (2013.01); D21H 23/70 (2013.01); B32B 2250/40 (2013.01); B32B 2255/12 (2013.01); B32B 2262/0269 (2013.01);
Abstract
A method of making a fiber-reinforced composite structure comprises the steps of (i) forming a paper sheet having a Gurley air resistance at least 200 seconds per 100 milliliters, the sheet comprising from 30 to 70 weight percent p-aramid fiber, (ii) depositing on both surfaces of the paper sheet a compression enhancing layer in a quantity up to 5 weight percent based on the weight of the paper, (iii) forming a honeycomb from the sheet of step (ii), and (iv) applying a matrix resin coating to the honeycomb of step (iii).