US3216187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength polyethylene terephthalate yarn
Assignee: EIDP Inc
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Filing: 1963-12-27
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Granted: 1965-11-09
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Expires: 1983-12-27
Abstract
No abstract record available.
Inventors
- 👤 William A Chantry
- 👤 Alberto E Molini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:01
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/0042; D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10S; Y10S57/00; Y10S57/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/298
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
HIGH-PERFORMANCE POLYETHYLENE TEREPHTHALATE FIBERS HAVING A MOLECULAR AND CRYSTALLINE STRUCTURAL CONFIGURATION CHARACTERIZED BY, (A) A LONG-PERIOD SPACING VALUE OF 125 TO 240 ANGSTROMS UNITS AS DETERMINED BY LOW ANGLE X-RAY SCATTERING MEASUREMENTS, (B) A SONIC VELOCITY (SV) VALUE OF 4 TO 6 KILOMETERS PER SECOND AS DETERMINED BY PASSING A SOUND WAVE HAVING A FREQUENCY OF 10000 CYCLES PER SECOND THROUGH FILAMENTS HELD UNDER A STRETCHING TENSION OF 3.0 GRAMS PER DENIER, (C) A DENSITY (P) VALUE OF 1.37 TO 1.42 GRAMS PER CUBIC CENTIMETER, (D) A RELATIVE VISCOSITY (RV) VALUE OF 47 TO 100 AS DETERMINED FOR A 10 PERCENT SOLUTION OF THE POLYESTER IN A MIXTURE OF 10 PARTS BY WEIGHT OF PHENOL AND 7 PARTS BY WEIGHT OF 2,4,6-TRICHLOROPHENOL, AND (E) A COMBINATION OF THE ABOVE VALUES WHEREIN X, CALCULATED FROM THE FORMULA
Claim 2
Dependent Claim
136 words
HIGH-PERFORMANCE POLYETHYLENE TEREPHTHALATE FIBERS HAVING A MOLECULAR AND CRYSTALLINE STRUCTURAL CONFIGURATION CHARACTERIZED BY, (A) A LONG-PERIOD SPACING VALUE OF 125 TO 240 ANGSTROMS UNITS AS DETERMINED BY LOW ANGLE X-RAY SCATTERING MEASUREMENTS, (B) A SONIC VELOCITY (SV) VALUE OF 4 TO 6 KILOMETERS PER SECOND AS DETERMINED BY PASSING A SOUND WAVE HAVING A FREQUENCY OF 10000 CYCLES PER SECOND THROUGH FILAMENTS HELD UNDER A STRETCHING TENSION OF 3.0 GRAMS PER DENIER, (C) A DENSITY (P) VALUE OF 1.37 TO 1.42 GRAMS PER CUBIC CENTIMETER, (D) A RELATIVE VISCOSITY (RV) VALUE OF 47 TO 100 AS DETERMINED FOR A 10 PERCENT SOLUTION OF THE POLYESTER IN A MIXTURE OF 10 PARTS BY WEIGHT OF PHENOL AND 7 PARTS BY WEIGHT OF 2,4,6-TRICHLOROPHENOL, AND (E) A COMBINATION OF THE ABOVE VALUES WHEREIN X, CALCULATED FROM THE FORMULA
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |