US3705844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the corona treatment of plastics
Assignee: Kalle GmbH and Co KG
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Filing: 1970-12-21
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Granted: 1972-12-12
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Expires: 1990-12-21
Abstract
Abstract THIS INVENTION RELATES TO AN APPARATUS FOR THE CORONA TREATMENT OF SHAPED ARTICLES OF PLASTIC COMPRISING A CIRCUIT INCLUDING A GENERATOR FOR GENERATING A VOLTAGE OF APPROPRIATE FREQUENCY, A HIGH-VOLTAGE TRANSFORMER FOR PRODUCING A SUITABLE OPERATING VOLTAGE, A GROUNDED ELECTRODE PROVIDED WITH A DIELECTRIC, AT LEAST ONE COUNTERELECTRODE AND AN INDUCTANCE COIL OF VARIABLE INDUCTIVITY.
Inventors
- 👤 Gunter Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:58
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/18; B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; H01; H01T; H01T19/00; H05; H05B; H05B7/00; H05B7/16; Y; Y02; Y02E; Y02E40/00; Y02E40/30; Y10; Y10S; Y10S422/00; Y10S422/907
Claims Analysis
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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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |