Patent US3400042A successfully refreshed from Google Patents.
US3400042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven synthetic leather
Assignee: 3M Co
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Filing: 1964-02-03
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Granted: 1968-09-03
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Expires: 1984-02-03
Abstract
No abstract record available.
Inventors
- 👤 Richard G Riedesel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:08
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/20; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/298
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A NON-WOVEN, MOISTURE VAPOR PERMEABLE, FLEXIBLE MAT-LIKE STRUCTURE, HAVING A BULK DENSITY LESS THAN THE SOLUTE DENSITY OF THE COMPONENT MATERIALS COMPRISING: (A) A UNIFORM MIXTURE OF AT LEAST TWO DIFFERENT TYPES OF MAN-MADE ORGANIC, POLYMERIC MATERIALS, (B) THE FIRST SUCH MATERIAL BEING IN THE PHYSICAL FORM OF ULTRA FINE FILAMENTS, EACH ULTRA FINE FILAMENT HAVING A MAXIMUM CROSS-SECTIONAL DIMENSION SMALLER THAN ABOUT 5 MICRONS, AND AT LEAST 50 WEIGHT PERCENT OF SUCH ULTRA FINE FILAMENTS HAVING MAXIMUM CROSSSECTIONAL DIMENSIONS NOT SMALLER THAN ABOUT 3 MICRONS AND MINIMUM RESPECTIVE LENGTH GREATER THAN ABOUT 600 MICRONS EACH. (C) THE SECOND SUCH MATERIAL BEING IN THE PHYSICAL FORM OF A SUBSTANTIALLY CONTINUOUS SKELETAL STRUCTURE, AND (D) SAID STRUCTURE HAVING SUBSTANTIALLY NONE OF SAID ULTRA FINE FILAMENTS FUSED TO ONE ANOTHER.
Claim 2
Dependent Claim
128 words
A NON-WOVEN, MOISTURE VAPOR PERMEABLE, FLEXIBLE MAT-LIKE STRUCTURE, HAVING A BULK DENSITY LESS THAN THE SOLUTE DENSITY OF THE COMPONENT MATERIALS COMPRISING: (A) A UNIFORM MIXTURE OF AT LEAST TWO DIFFERENT TYPES OF MAN-MADE ORGANIC, POLYMERIC MATERIALS, (B) THE FIRST SUCH MATERIAL BEING IN THE PHYSICAL FORM OF ULTRA FINE FILAMENTS, EACH ULTRA FINE FILAMENT HAVING A MAXIMUM CROSS-SECTIONAL DIMENSION SMALLER THAN ABOUT 5 MICRONS, AND AT LEAST 50 WEIGHT PERCENT OF SUCH ULTRA FINE FILAMENTS HAVING MAXIMUM CROSSSECTIONAL DIMENSIONS NOT SMALLER THAN ABOUT 3 MICRONS AND MINIMUM RESPECTIVE LENGTH GREATER THAN ABOUT 600 MICRONS EACH. (C) THE SECOND SUCH MATERIAL BEING IN THE PHYSICAL FORM OF A SUBSTANTIALLY CONTINUOUS SKELETAL STRUCTURE, AND (D) SAID STRUCTURE HAVING SUBSTANTIALLY NONE OF SAID ULTRA FINE FILAMENTS FUSED TO ONE ANOTHER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |