US3697303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating the surface of a material
Assignee: Kalle GmbH and Co KG
•
Filing: 1969-09-29
•
Granted: 1972-10-10
•
Expires: 1989-09-29
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS FOR COATING THE SURFACE OF A MATERIAL WITH AN ELECTRICALLY CONDUCTIVE, SEMICONDUCTIVE, OR NON-CONDUCTIVE SUBSTANCE, IN WHICH PROCESS EITHER A HIGHLY INSULATING BASE MATERIAL OR BASE MATERIAL WITH A HIGHLY INSULATING BACKING IS COMPLETELY DISCHARGED, THE SURFACE OF THE MATERIAL IS THEN ELECTRICALLY CHARGED BY MEANS OF A DIRECT-CURRENT CORONA DISCHARGE, AND COATED WITHIN A FIELD OF UNIFORM FIELD STRENGTH DISTRIBUTION WITH THE SUBSTANCE DISPERSED IN A DIELECTRIC LIQUID, WHILE THE MATERIAL IS IN CLOSE CONTACT WITH AN ELECTRICALLY CONDUCTIVE SUPPORT.
Inventors
- 👤 Walter Busch
- 👤 Heinz Kramer
- 👤 Erwin Lind
- 👤 Dieter Messner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/06; B05; B05D; B05D1/00; B05D1/007; B05D3/00; B05D3/14; B05D3/141; B05D3/142; C; C25; C25D; C25D13/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |