US2820752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of tetrafluoroethylene polymers
Assignee: EIDP Inc
•
Filing: 1954-02-04
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Granted: 1958-01-21
•
Expires: 1974-02-04
Abstract
No abstract record available.
Inventors
- 👤 George William Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:35
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR CONTINUOUSLY COATING WIRE WITH SUBSTANTIALLY PURE POLYTETRAFLUOROETHYLENE IN THE FORM OF A HOMOGENEOUS SMOOTH CRACK-FREE COATING OF ELECTRICAL INSULATION, WHICH COMPRISES MAINTAINING AN AQUEOUS CODISPERSION CONTAINING 20% TO 60% BY WEIGHT OF SOLIDS COMPRISING POLYTETRAFLUOROETHYLENE AND POLYISOBUTYLENE, THE RATIO OF POLYTETRAFLUOROETHYLENE SOLIDS TO POLYISOBUTYLENE SOLIDS BEING FROM ABOUT 20:1 TO ABOUT 4:1. CONTINUOUSLY PASSING A WIRE THROUGH SAID CODISPERSION WHICH IS SIMULTANEOUSLY SUBJECTED TO A DIRECT CURRENT OF ELECTRICITY IN SUCH A FASHION THAT SAID WIRE IS ANODIC, CONTINUOUSLY REMOVING A WIRE COATED WITH A WET MIXTURE OF POLYTETRAFLUOROETHYLENE AND POLYISOBUTYLENE, CONTINUOUSLY DRYING THE COATED WIRE, AND CONTINUOUSLY PASSING THE DRIED COATED WIRE THROUGH A ZONE, MAINTAINED AT A TEMPERATURE FROM
Claim 2
Dependent Claim
114 words
A PROCESS FOR CONTINUOUSLY COATING WIRE WITH SUBSTANTIALLY PURE POLYTETRAFLUOROETHYLENE IN THE FORM OF A HOMOGENEOUS SMOOTH CRACK-FREE COATING OF ELECTRICAL INSULATION, WHICH COMPRISES MAINTAINING AN AQUEOUS CODISPERSION CONTAINING 20% TO 60% BY WEIGHT OF SOLIDS COMPRISING POLYTETRAFLUOROETHYLENE AND POLYISOBUTYLENE, THE RATIO OF POLYTETRAFLUOROETHYLENE SOLIDS TO POLYISOBUTYLENE SOLIDS BEING FROM ABOUT 20:1 TO ABOUT 4:1. CONTINUOUSLY PASSING A WIRE THROUGH SAID CODISPERSION WHICH IS SIMULTANEOUSLY SUBJECTED TO A DIRECT CURRENT OF ELECTRICITY IN SUCH A FASHION THAT SAID WIRE IS ANODIC, CONTINUOUSLY REMOVING A WIRE COATED WITH A WET MIXTURE OF POLYTETRAFLUOROETHYLENE AND POLYISOBUTYLENE, CONTINUOUSLY DRYING THE COATED WIRE, AND CONTINUOUSLY PASSING THE DRIED COATED WIRE THROUGH A ZONE, MAINTAINED AT A TEMPERATURE FROM
References Cited (Backward Citations)
US2478322A
Cited
US2681324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |