Patent US4122211A successfully refreshed from Google Patents.
US4122211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating electric or electronic elements
Assignee: Sumitomo Durez Co Ltd
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Filing: 1976-12-17
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Granted: 1978-10-24
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Expires: 1996-12-17
Abstract
Abstract A process for coating electronic elements comprises the steps of (1) forcibly impregnating an element with a liquid thermosetting resin undercoat, (2) depositing a powdered coating material on the element as a topcoat by electrostatic fluidized bed dip coating the element before the undercoat is dry, and (3) curing the resin by heating.
Inventors
- 👤 Toyoji Kikuga
- 👤 Masayuki Nakamura
- 👤 Tateo Goto
- 👤 Tosaku Amakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:15
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/01; H01; H01B; H01B17/00; H01B17/56; H01B17/62; H01B3/00; H01B3/18; H01B3/30; H01B3/40; H10W74/10; H10W74/131; H10W74/40; H10W74/47; B; B05; B05D; B05D2451/00; B05D7/00; B05D7/50; B05D7/52; B05D7/54; B05D7/542
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
An improved coating process for electronic elements which comprises the steps of: (1) forcibly impregnating the element with a liquid thermosetting resin, (2) applying a powdered resin to the element before the liquid thermosetting resin is dry by electrostatic fluidized bed dip coating, and (3) heating the element to cure the liquid thermosetting resin.
Claim 2
Dependent Claim
54 words
An improved coating process for electronic elements which comprises the steps of: (1) forcibly impregnating the element with a liquid thermosetting resin, (2) applying a powdered resin to the element before the liquid thermosetting resin is dry by electrostatic fluidized bed dip coating, and (3) heating the element to cure the liquid thermosetting resin.
Claim 3
Dependent Claim
39 words
The process of claim 1 wherein the liquid thermosetting resin is selected from the group consisting of epoxy resins containing hardeners, unsaturated polyester resins, resole-type phenolic resin, diallyl phthalate resins, urethane resins, butadiene polymers, silicone resins, and mixtures thereof.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the liquid thermosetting resin is an epoxy resin containing a liquid acid anhydride hardener.
Claim 5
Dependent Claim
32 words
The process of claim 1 wherein the powdered resin is selected from the group consisting of epoxy resins, polyester resins, acrylic resins, polyurethane resins, polyamide resins, vinyl chloride resins, and mixtures thereof.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein the powdered resin is an epoxy resin.
Claim 7
Dependent Claim
10 words
An electronic element coated by the process of claim 1.
Claim 8
Dependent Claim
10 words
A film capacitor coated by the process of claim 1.
Claim 9
Dependent Claim
9 words
A resistor coated by the process of claim 1.
Claim 10
Dependent Claim
11 words
An assembled circuit module coated by the process of claim 1.
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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |