US3017339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for treating surfaces of extruded thermoplastic tubing with corona discharge
Assignee: Primerica Inc
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Filing: 1957-01-24
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Granted: 1962-01-16
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Expires: 1977-01-24
Abstract
No abstract record available.
Inventors
- 👤 Dewey Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:15
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10; B29C59/103; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; B29C48/00; B29C48/25; B29C48/03; B29C48/09; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29L; B29L2023/00; B29L2023/20; B29L2023/22; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
134 words
A METHOD OF TREATING THE SURFACES OF THERMOPLASTIC TUBING FOR THE RECEPTION OF A SURFACE COATING, COMPRISING ADVANCING A CONTINOUS LENGTH OF TUBING ALONG A PATH OF TRAVEL, MAINTAINING THE TUBE FULLY EXPANDED FOR AT LEAST A PORTION OF ITS PATH OF TRAVEL, PASSING THE WALL OF THE EXPANDED PORTION OF THE TUBING CONTINUOUSLY BETWEEN A PAIR OF CONCENTRICALLY SPACED ELECTRODES ONE OF WHICH IS ARRANGED INTERNALLY OF THE TUBING AND THE OTHER EXTERNALLY THEREOF WITH BOTH ELECTODES ARRANGED TO NEARLY FIT THE TUBING SIZE AND SHAPE, SO GUIDING THE TUBING AS TO BE SPACED A SMALL BUT SUBSTANTIALLY CONSTANT AND UNIFORM DISTANCE RADICALLY FORM THE SURFACE OF AT LEAST ONE OF SAID ELECTRODES, AND IMPRESSING A HIGH VALUE ALTERING VOLTAGE ACROSS THE SPACE BETWEEN SAID ELECTRODES AT VALUES TO PRODUCE A CORONA DISCHARGE.
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) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |