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Sanitary Napkins Patents in USA

- wings design and features like shape, stretchability or simply way of folding them

- core structure using new materials (eg foam) or a specific combination of already known layers. 

- raw materials to obtain better performances or improved fit like soft topsheet or stretchable ply

- printings on some specific webs 

- added value packagings

Having a review of all of them allow you to understand what is the state of the art of sanitary napkins in USA and be prepared in case you are thinking to start selling a product here.

Let us know your doubts and request specific survey.

 US patent No

4.892.534 Nonwoven web useful as a bodyside liner for an absorption article

4.950.264 Thin, flexible sanitary napkin 

5.009.653 Thin, flexible sanitary napkin

5.147.343 Absorbent products containing hydrogels with ability to swell against pressure

5.147.345 High efficiency absorbent articles for incontinence management 

5.260.345 Absorbent foam materials for aqueous body fluids and absorbent articles containing such materials

5.268.224 Absorbent foam materials for aqueous body fluids and absorbent articles containing such materials

5.318.554 High efficiency absorbent articles for incontinence management 

5.331.015 Absorbent foam materials for aqueous body fluids and absorbent articles containing such materials

5.354.400 Method of making absorbent article having flaps and zones of differential extensibility

5.387.207 Thin-unit-wet absorbent foam materials for aqueous body fluids and process for making same 

5.389.094 Absorbent article having flaps and zones of differential extensibility 

5.413.568 Refastenable adhesive fastening systems for individually packaged disposable absorbent articles

5.462.166 Package seal for individually packaged sanitary napkins 

5.518.801 Web materials exhibiting elastic-like behavior

5.520.875 Process for producing a surfactant treated, formed, polymeric web

5.569.231 Trisection sanitary napkin

5.620.430 Absorbent article having flaps and zones of differential extensibility 

5.628.097 Method for selectively aperturing a nonwoven web

5.652.194 Process for making thin-until-wet absorbent foam materials for aqueous body fluids 

5.795.344 ABSORBENT ARTICLE WITH PROTECTION CHANNEL 

5.800.654 Method of making sanitary napkin having improved flap disposition and means for maintaining the flap therein

5.817.704 Heterogeneous foam materials

5.856.366 Process for making heterogeneous foam materials

5.869.171 Heterogeneous foam materials 

5.916.661 Selectively apertured nonwoven web

5.968.029 Web materials exhibiting elastic-like behavior

6.087.551 Multi-denier non-woven fabric for disposable absorbent products

6.117.523 Absorbent article with comfortable and rapid acquisition topshee

6.139.912 Method for intermittent application of particulate material   

6.204.298 Processes for the rapid preparation of foam materials from high internal phase emulsions at high temperatures and pressures

6.207.724 Foam materials and high internal phase emulsions made using oxidatively stable emulsifiers

6.231.555 Absorbent article having improved integrity and acquisition

6.362.243 Method for production of porous cross-linked polymer

6.362.244 Method for degassification of high internal phase emulsion components

6.365.642 Rapid preparation of foam materials from high internal phase emulsions

6.369.121 Rapid preparation of foam materials from high internal phase emulsions

6.395.792 Method for production of porous cross-linked poymer 

6.444.716 Foam materials and high internal phase emulsions made using oxidatively stable emulsifiers

6.525.106 Method for continuous curing of hipe into hipe foams

6.601.705 Package containing a window and performance charcteristic indicator 

6.649.665 Method for production of porous cross-linked polymer material  

6.750.263 Method for production of porous cross-linked polymer

7.163.528 Absorbent article

7.185.761 Package containing a window and a performance characteristic indicato

7.241.280 Absorbent article having perception of depth

7.270.651 Absorbent article

7.306.582 Absorbent article

7.311.696 Absorbent article 

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