A process for treating a fibrous material which includes the steps of: 1) providing a liquid suspension composed of fibrous material; 2) intermixing the liquid suspension of fibrous material with a treatment over a time period T.sub.1 --wherein the treatment requires a period of time T.sub.R sufficient to treat the fibrous material; 3) depositing the liquid suspension of fibrous material and intermixed treatment onto a forming surface to form a layer and removing a substantial portion of the liquid, over a period of time T.sub.2 ; and 4) applying pressurized jets of a liquid to the layer of fibrous material to wash unused treatment from the fibrous material within a period of time T.sub.3. Periods of time T.sub.1, T.sub.2 and T.sub.3 are immediately consecutive and amount to a total period of time at least as great as T.sub.R. Also disclosed is a hydraulically entangled structure composed of: 1) at least one layer a wet-laid nonwoven web containing fibrous cellulosic material; and 2) colorfast dye imparting color to the fibrous cellulosic material such that the fibrous cellulosic material is colorfast.

Claims

25 · 3 independent · depth 4

25 granted claims

›1.independentA process for treating a fibrous material comprising: providing a liquid suspension comprising fibrous material; intermixing the liquid suspension of …+6

›8.independentA process for forming a web of treated fibrous cellulosic material comprising: providing an aqueous suspension comprising hydrated fibrous cellulosic …+8

›9.↳ 8The process of claim 8 wherein the deposited layer of fibrous material containing the intermixed treatment is combined with at least one other layer o…d2

›10.↳ 8The process of claim 8 wherein the forming surface includes at least one layer of sheet material between the forming surface and the deposited layer o…d2+2

›13.↳ 8The process of claim 8 wherein the web is hydraulically entangled.d2

›14.↳ 8The process of claim 8 wherein the web is hydraulically needled.d2

›15.↳ 8The process of claim 8 wherein the fibrous cellulosic material is selected from pulp fibers, synthetic cellulose fibers and combinations thereof.d2

›16.↳ 8The process of claim 8 further including at least one post treatment step.d2

›17.independentA process for forming a web of colorfast fibrous cellulosic material comprising: providing an aqueous suspension comprising hydrated fibrous cellulosi…+8

›18.↳ 17The process of claim 17 wherein the deposited layer of fibrous material containing the intermixed treatment is combined with at least one other layer …d2

›19.↳ 17The process of claim 17 wherein the forming surface includes at least one layer of sheet material between the forming surface and the deposited layer …d2+2

›22.↳ 17The process of claim 17 wherein the web is hydraulically entangled.d2

›23.↳ 17The process of claim 17 wherein the web is hydraulically needled.d2

›24.↳ 17The process of claim 17 wherein the fibrous cellulosic material is selected from pulp fibers, synthetic cellulose fibers and combinations thereof.d2

›25.↳ 17The process of claim 17 further including at least one post treatment step.d2

Classifications

6 codes

USPC · US Patent Classification

162/115281/5442/408281/7281/4162/108

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

2.6 y

942 days filing → grant

Office actions

on the grant's record

Examiner

Stanley S. Silverman

art unit —

Law firm

Law firm · Log in to unlock

Citations: 20 back · 2 forward

Term & fees

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

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.