US3663406A
Expired / Lapsed
US
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Combined electrodialysis and ultrafiltration of an electrodeposition bath
Assignee: PPG Industries Inc
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Filing: 1971-03-11
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Granted: 1972-05-16
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Expires: 1991-03-11
Abstract
Abstract A METHOD FO CONTROLLING UNDESIRABLE COMPONENTS IN AN ELECTROPEDPOSTION BATH COMPRISING A FILM-FORMING VEHICLE RESIN IN AN AQUEOUS MEDIUM, BY SUBJECTING AT LEAST A PORTION OF THE ELECTRODEPOSITABLE COMPOSITION, SIMULTANEOUSLY OR AT A SEPARATE TIME, TO AN ELECTRODIALYSIS PROCESS IN CONJUCTION WITH SELECTIVE SEPARATION PROCESS WHEREBY PROCESS PARAMETERS AND THE PROPERTIES OF THE DEPOSITED FILM ARE MAINTAINED.
Inventors
- 👤 Louis R Le Bras
- 👤 Robert R Zwack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:20
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/58; B01D61/14; B01D61/18; C; C25; C25D; C25D13/00; C25D13/22; C25D13/24; B01D61/02; B01D61/025; B01D61/145; B01D61/42; B01D61/44; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249975; Y10T428/8305
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |