Patent US4698240A successfully refreshed from Google Patents.
US4698240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for moistureproof coating of an electrical product
Assignee: AGC Inc
•
Filing: 1986-02-19
•
Granted: 1987-10-06
•
Expires: 2006-02-19
Abstract
Abstract A method for moistureproof coating of an electrical product, which comprises applying an organic solution of a polyfluoroalkyl group-containing polymer dissolved in a non-combustible low boiling point organic solvent, to a surface of an electrical product, and drying it by evaporating the low boiling point organic solvent, to form a coating layer of the polyfluoroalkyl group-containing polymer on the surface of the electrical product, wherein said polyfluoroalkyl group-containing polymer is a copolymer of a polymerizable compound having a polyfluoroalkyl group with other polymerizable compound, and the copolymer has a glass transition temperature of not higher than 60 DEG C.
Inventors
- 👤 Yusuke Ono
- 👤 Sachio Ohotoshi
- 👤 Masaru Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:15
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/285; C; C09; C09D; C09D133/00; C09D133/04; C09D133/14; C09D133/16; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/447; H05K2201/00; H05K2201/09; H05K2201/09818; H05K2201/09872; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A method for moistureproof coating of an electrical product, which comprises applying an organic solution of a polyfluoroalkyl group-containing polymer dissolved in a non-combustible low boiling point organic solvent, to a surface of an electrical product, and drying it by evaporating the low boiling point organic solvent, to form a coating layer of the polyfluoroalkyl group-containing polymer on the surface of the electrical product, wherein said polyfluoroalkyl group-containing polymer is a copolymer of a polymerizable compound having a polyfluoroalkyl group with other polymerizable compound, and the copolymer has a glass transition temperature of not higher than 60° C.
Claim 2
Independent Claim
98 words
A method for moistureproof coating of an electrical product, which comprises applying an organic solution of a polyfluoroalkyl group-containing polymer dissolved in a non-combustible low boiling point organic solvent, to a surface of an electrical product, and drying it by evaporating the low boiling point organic solvent, to form a coating layer of the polyfluoroalkyl group-containing polymer on the surface of the electrical product, wherein said polyfluoroalkyl group-containing polymer is a copolymer of a polymerizable compound having a polyfluoroalkyl group with other polymerizable compound, and the copolymer has a glass transition temperature of not higher than 60° C.
Claim 3
Dependent Claim
27 words
The method according to claim 1, wherein the proportion of the polymerizable compound having a polyfluoroalkyl group in the copolymer is from 30 to 90% by weight.
Claim 4
Dependent Claim
24 words
The method according to claim 1, wherein the polymerizable compound having a polyfluoroalkyl group is an acrylate or methacrylate having a terminal polyfluoroalkyl group.
Claim 5
Dependent Claim
22 words
The method according to claim 1, wherein the organic solution contains from 0.1 to 40% by weight of the polyfluoroalkyl group-containing polymer.
Claim 6
Dependent Claim
19 words
The method according to claim 1, wherein the coating layer has a thickness of from 0.1 to 50 μm.
Claim 7
Dependent Claim
26 words
The method according to claim 1, wherein the electrical product is a printed circuit, an integrated circuit, a resistor, a capacitor, a switch or a connector.
Claim 8
Dependent Claim
11 words
An electrical product prepared by the method according to claim 1.
References Cited (Backward Citations)
US3931454A
Cited
US4337268A
Cited
US4472480A
Cited
US4526833A
Cited
US4550061A
Cited
US4554172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |