US3784460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined electrodialysis and ultrafiltration of an electrodeposition bath
Assignee: PPG Industries Inc
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Filing: 1972-03-13
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Granted: 1974-01-08
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Expires: 1992-03-13
Abstract
Abstract A method of controlling undesirable components in an electrodeposition 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 conjunction with a selective separation process whereby process parameters and the properties of the deposited film are maintained.
Inventors
- 👤 Bras L Le
- 👤 R Zwack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:13
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
Total Claims: 3
Claim 1
Independent Claim
14 words
Apparatus as in claim 1 wherein said electrodialysis compartment comprises a plant fiber membrane.
Claim 2
Dependent Claim
12 words
Apparatus as in claim 1 comprising means for flushing said counter-electrode compartment.
Claim 3
Dependent Claim
14 words
Apparatus as in claim 1 wherein said selective separation unit is an ultrafiltration unit.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |