US3157785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corona treating of hollow plastic articles
Assignee: Primerica Inc
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Filing: 1961-03-30
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Granted: 1964-11-17
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Expires: 1981-03-30
Abstract
No abstract record available.
Inventors
- 👤 Dobson Frank Egremont
- 👤 Badavas Charles Arthur
- 👤 Flint Richard Stearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:18
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10; B29C59/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A DEVICE FOR CORONA TREATING HOLLOW OPEN-END ARTICLES COMPRISING A PERFORATE CONDUCTIVE MANDREL LOOSELY FITTING THE INTERIOR OF THE ARTICLES TO BE TREATED, A COLLAR SURROUNDING THE MANDREL AND HAVING A RECESS FOR FRICTIONALLY EXTERIORLY RECEIVING THE OPEN END OF THE ARTICLE, MEANS FOR INTRODUCING FLUID UNDER PRESSURE THROUGH THE MANDREL PERFORATION TO SPACE THE ARTICLE SLIGHTLY FROM THE MANDREL SURFACE, AN ELECTRODE MOUNTED ADJACENT THE MANDREL, AND MEANS FOR IMPRESSING A HIGH LEVEL ALTERNATING VOLTAGE BETWEEN SAID ELECTRODE AND MANDREL TO GENERATE A CORONA DISCHARGE AT THE ARTICLE SURFACES.
Claim 2
Independent Claim
90 words
A DEVICE FOR CORONA TREATING HOLLOW OPEN-END ARTICLES COMPRISING A PERFORATE CONDUCTIVE MANDREL LOOSELY FITTING THE INTERIOR OF THE ARTICLES TO BE TREATED, A COLLAR SURROUNDING THE MANDREL AND HAVING A RECESS FOR FRICTIONALLY EXTERIORLY RECEIVING THE OPEN END OF THE ARTICLE, MEANS FOR INTRODUCING FLUID UNDER PRESSURE THROUGH THE MANDREL PERFORATION TO SPACE THE ARTICLE SLIGHTLY FROM THE MANDREL SURFACE, AN ELECTRODE MOUNTED ADJACENT THE MANDREL, AND MEANS FOR IMPRESSING A HIGH LEVEL ALTERNATING VOLTAGE BETWEEN SAID ELECTRODE AND MANDREL TO GENERATE A CORONA DISCHARGE AT THE ARTICLE SURFACES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |