Patent US3276944A successfully refreshed from Google Patents.
US3276944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven sheet of synthetic organic polymeric filaments and method of preparing same
Assignee: EIDP Inc
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Filing: 1963-08-30
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Granted: 1966-10-04
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Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
- 👤 Levy Martin Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
B; B32; B32B; B32B27/00; D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H3/00; D04H3/005; D04H3/007; D04H3/009; D04H3/011; D04H3/08; D04H3/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T442/00; Y10T442/60; Y10T442/654; Y10T442/656; Y10T442/674; Y10T442/675; Y10T442/69; Y10T442/692
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A TOUGH NONWOVEN SHEET HAVING A TONGUE TEAR GREATER THAN 1.5 LB.//OZ./YD.2 COMPRISING RANDOMLY DISPOSED CRYSTALLINE AND ORIENTED SYNTHETIC ORGANIC POLYMERIC FILAMENTS OF TEXTILE DENIER, SAID FILAMENTS BEING SELECTED FROM THE GROUP CONSISTING OF ISOTACTIC POLYPROPYLENE, LINEAR POLYETHYLENE, POLYETHYLENE TEREPHTHALATE, POLYHEXAMETHYLENE ADIPAMIDE, POLYCAPROAMIDE, COPOLYESTER OF ETHYLENE GLYCOL WITH A 90%.10% MIXTURE OF TEREPHTHALIC/ISOPHTHALIC ACIDS, CRYSTALLINE COPOLYMERS OF AT LEAST 75% PROPYLENE OR ETHYLENE WITH UP TO 25% OF OTHER COPOLYMERIZABLE MONOMERS AND MIXTURES OF AT LEAST 75% ISOTACTIC POLYPROPYLENE OR LINEAR POLYETHYLENE WITH UP TO 25% OF OTHER POLYMERS, AND BEING SELF-BONDED AT A MULTIPLICITY OF FILAMENT INTERSECTION POINTS AND POSSESSING A BRIEFRINGENCE THAT IS AT LEAST 40% OF THEIR MAXIMUM BIREFRINGENCE, AND SAID SHEET HAVING AN AVERAGE EDGE BOND COUNT OF BETWEEN ABOUT 30 AND 85 BONDS PER HUNDRED FILAMENTS.
Claim 2
Dependent Claim
131 words
A TOUGH NONWOVEN SHEET HAVING A TONGUE TEAR GREATER THAN 1.5 LB.//OZ./YD.2 COMPRISING RANDOMLY DISPOSED CRYSTALLINE AND ORIENTED SYNTHETIC ORGANIC POLYMERIC FILAMENTS OF TEXTILE DENIER, SAID FILAMENTS BEING SELECTED FROM THE GROUP CONSISTING OF ISOTACTIC POLYPROPYLENE, LINEAR POLYETHYLENE, POLYETHYLENE TEREPHTHALATE, POLYHEXAMETHYLENE ADIPAMIDE, POLYCAPROAMIDE, COPOLYESTER OF ETHYLENE GLYCOL WITH A 90%.10% MIXTURE OF TEREPHTHALIC/ISOPHTHALIC ACIDS, CRYSTALLINE COPOLYMERS OF AT LEAST 75% PROPYLENE OR ETHYLENE WITH UP TO 25% OF OTHER COPOLYMERIZABLE MONOMERS AND MIXTURES OF AT LEAST 75% ISOTACTIC POLYPROPYLENE OR LINEAR POLYETHYLENE WITH UP TO 25% OF OTHER POLYMERS, AND BEING SELF-BONDED AT A MULTIPLICITY OF FILAMENT INTERSECTION POINTS AND POSSESSING A BRIEFRINGENCE THAT IS AT LEAST 40% OF THEIR MAXIMUM BIREFRINGENCE, AND SAID SHEET HAVING AN AVERAGE EDGE BOND COUNT OF BETWEEN ABOUT 30 AND 85 BONDS PER HUNDRED FILAMENTS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |