Patent US2946763A successfully refreshed from Google Patents.
US2946763A
Expired / Lapsed
US
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Novel perfluorocarbon polymers
Assignee: EIDP Inc
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Filing: 1957-03-29
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Granted: 1960-07-26
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Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
- 👤 Bro Manville Isager
- 👤 Sandt Bernd Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/20; C08F; C08F214/00; C08F214/18; C08F214/26; C08F214/28; C08K; C08K3/00; C08K3/10; C08K3/105; C08L27/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
AS A NEW PERFLUOROCARBON PRODUCT, RESINOUS INTERPOLYMERIC HEXAFLUOROPROPYLENE AND TETRAFLUOROETHYLENE, HAVING A SPECIFIC MELT VISCOSITY, AS MEASURED AT 380*C. UNDER A SHEAR STRESS OF 6.5 POUNDS PER SQUARE INCH, OF 1.5X10**3 TO 3X10**5 POSIES, A SPECIFIC I.R. RATIO, AS MEASURED ON FILM OF ABOUT 2 MIL THICKNESS WATER-QUENCHED FROM THE MOLTED PRODUCT, BY NET ABSORBANCE AT 10.18 MICRONS WAVE LENGTH DIVIDED BY NET ABSORBANCE AT 4.25 MICRONS WAVE LENGTH, IN THE RANGE OF 1.5 TO 6, WHICH RATIO IS AT LEAST EQUAL TO THE DIFFERENCE BETWEEN 12.26
Claim 2
Dependent Claim
87 words
AS A NEW PERFLUOROCARBON PRODUCT, RESINOUS INTERPOLYMERIC HEXAFLUOROPROPYLENE AND TETRAFLUOROETHYLENE, HAVING A SPECIFIC MELT VISCOSITY, AS MEASURED AT 380*C. UNDER A SHEAR STRESS OF 6.5 POUNDS PER SQUARE INCH, OF 1.5X10**3 TO 3X10**5 POSIES, A SPECIFIC I.R. RATIO, AS MEASURED ON FILM OF ABOUT 2 MIL THICKNESS WATER-QUENCHED FROM THE MOLTED PRODUCT, BY NET ABSORBANCE AT 10.18 MICRONS WAVE LENGTH DIVIDED BY NET ABSORBANCE AT 4.25 MICRONS WAVE LENGTH, IN THE RANGE OF 1.5 TO 6, WHICH RATIO IS AT LEAST EQUAL TO THE DIFFERENCE BETWEEN 12.26
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |