Patent US3893620A successfully refreshed from Google Patents.
US3893620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic atomization of conductive paints
Assignee: DeSoto Inc
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Filing: 1973-10-04
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Granted: 1975-07-08
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Expires: 1993-10-04
Abstract
Abstract Conductive paints are electrostatically sprayed by electrically isolating the electrostatic charge imposed on the atomizing head from the paint supply tank to prevent dissipation of the charge through the conductive paint which is supplied.
Inventors
- 👤 Abdullah M Rokadia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:02
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/16; B05B5/1608; B05B5/1616; B05B5/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A method for electrostatically spraying an electrically conductive aqueous paint comprising supplying an unconfined continuous column of said paint through an intervening air space to an electrically isolated paint reservoir, and then conveying said aqueous paint from said electrically isolated reservoir as a confined column in a paint supply line to an electrostatically charged atomizing device so that said electrostatic charge is conducted back through said paint to the electrically isolated paint reservoir to create a charged field around said reservoir, the paint providing said unconfined continuous column supplied to said reservoir being released to provIde said unconfined column from a point at least about 2 feet above said reservoir.
Claim 2
Independent Claim
110 words
A method for electrostatically spraying an electrically conductive aqueous paint comprising supplying an unconfined continuous column of said paint through an intervening air space to an electrically isolated paint reservoir, and then conveying said aqueous paint from said electrically isolated reservoir as a confined column in a paint supply line to an electrostatically charged atomizing device so that said electrostatic charge is conducted back through said paint to the electrically isolated paint reservoir to create a charged field around said reservoir, the paint providing said unconfined continuous column supplied to said reservoir being released to provIde said unconfined column from a point at least about 2 feet above said reservoir.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |