The present invention provides an optical layered body having excellent hardness, abrasion resistance, and flexibility. The present invention provides an optical layered body having a hard coat layer on one side of a triacetylcellulose substrate, wherein a Martens hardness (N 1 ) of a surface of the hard coat layer, a Martens hardness (N 2 ) of the center of the cross-section of the hard coat layer, and a Martens hardness (N 3 ) of the center of the cross-section of the triacetylcellulose substrate have a relationship of N 2 >N 1 >N 3 as determined by nanoindentation, and the hard coat layer has a pencil hardness of 4H or more as measured by a test in accordance with a pencil hardness test defined in JIS K5600-5-4 (1999) at a load of 4.9 N.

Claims

10 · 2 independent · depth 4

10 granted claims

›1.independentAn optical layered body comprising a hard coat layer formed on one side of a triacetylcellulose substrate,nwherein a Martens hardness (N1) of a surfac…+8

›2.↳ 1The optical layered body according to claim 1,nwherein the Martens hardness (N3) of the center of the cross-section of the triacetylcellulose substrat…d2+1

›4.↳ 1The optical layered body according to claim 1,nwherein the hard coat layer comprises reactive irregularly shaped silica fine particles each comprising…d2+3

›8.↳ 1A polarizer comprising a polarizing element,nwherein the polarizer comprises the optical layered body according to claim 1 on a surface of the polariz…d2

›10.↳ 1An image display device comprising the optical layered body according to claim 1 on an outermost surface thereof.d2

›9.independentAn image display device comprising an optical layered body comprising a hard coat layer formed on one side of a triacetylcellulose substrate,nwherein …

Classifications

2 codes

IPC · International Patent Classification

Section G — Physics

G02B5/30
G02B1/10

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

4.2 y

1,540 days filing → grant

Office actions

non-final + final

Responses

no RCE

Examiner

Frank Font

art unit 2872 · TC 2800

Law firm

Law firm · Log in to unlock

Citations: 9 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20130201556 A1	8 Aug 2013

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.