Inventor
John F. Steffen
Inventor
Denver, NC, US
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A61Fprimary
A61FFilters implantable into blood vessels20%
D01DMechanical methods or apparatus in the manufacture of artificial filaments, threads, fibres, bristles or ribbons20%
A61LMethods or apparatus for sterilising materials or objects in general13%
A61BDiagnosis7%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form7%
B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors7%
D01FChemical features in the manufacture of artificial filaments, threads, fibres, bristles or ribbons7%
D02GCrimping or curling fibres, filaments, threads, or yarns7%
D04HMaking textile fabrics, e.g. from fibres or filamentary material7%
Y10TTechnical subjects covered by former us classification7%
PatentTitleYear
11,060,207Multi-zone spinneret, apparatus and method for making filaments and nonwoven fabrics therefrom202111,008,169Driving device for a roller conveyor202110,494,744Self-crimped ribbon fiber and nonwovens manufactured therefrom201910,301,746Multi-zone spinneret, apparatus and method for making filaments and nonwoven fabrics therefrom20198,426,671'Liquid management layer for personal care absorbent articles'20137,326,747'Internal wetting agent for use in manufacture of polymeric films and fabrics for disposable absorbent articles'20087,326,314'Method of making a nonwoven absorbent fabric'20085,716,470'Loop material for improved attachment to disposable garments'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998Patents assigned to KIMBERLY CLARK CO (1)· patent assignee history
1998Based in Appleton, WI, US· patent location history
2008–2013Patents assigned to POLYMER GROUP INC (3)· patent assignee history
2008Based in Sugar Hill, GA, US· patent location history
2013Patents assigned to GRONDIN PIERRE D (1)· patent assignee history
2013–2021Based in Denver, NC, US· patent location history
2019–2021Patents assigned to AVINTIV SPECIALTY MATERIALS INC (3)· patent assignee history
2021Patents assigned to INTERROLL HOLDING AG (1)· patent assignee history
2021Based in Sant'Antonino, CH· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| AVINTIV SPECIALTY MATERIALS INC | 3 | 2019–2021 |
| POLYMER GROUP INC | 3 | 2008–2013 |
| GRONDIN PIERRE D | 1 | 2013 |
| INTERROLL HOLDING AG | 1 | 2021 |
| KIMBERLY CLARK CO | 1 | 1998 |
Locations
| Location | Patents | Span |
|---|---|---|
| Denver, NC, US | 4 | 2013–2021 |
| Sugar Hill, Georgia, US | 2 | 2008 |
| Sant'Antonino, CH | 1 | 2021 |
| Appleton, WI, US | 1 | 1998 |