US4413510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating adhesion testing
Assignee: RCA Corp
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Filing: 1981-11-19
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Granted: 1983-11-08
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Expires: 2001-11-19
Abstract
Abstract A method of testing the adhesion between a coating and its substrate applies a force to a sample by means of a plunger and supporting ring apparatus. The force is increased laterally while the force and the resulting deflection are measured. When the slope of the force-deflection curve changes abruptly, the test is terminated, and the value of force required to produce that condition is noted. The test is nondestructive.
Inventors
- 👤 Joseph H. McCusker
- 👤 Barry J. Thaler
- 👤 Wei H. Tsien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:11
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/04; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/053
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A method of testing the adhesion of a coating to a substrate comprising the steps of: supporting the substrate against motion in a given direction, biasing a force applying member against the coating, increasing the force, measuring the force and the deflection caused by the force-applying member, and terminating the test when the rate of deflection as a function of increasing force decreases.
Claim 2
Independent Claim
63 words
A method of testing the adhesion of a coating to a substrate comprising the steps of: supporting the substrate against motion in a given direction, biasing a force applying member against the coating, increasing the force, measuring the force and the deflection caused by the force-applying member, and terminating the test when the rate of deflection as a function of increasing force decreases.
Claim 3
Dependent Claim
46 words
A method of testing the adhesion of a coating as defined in claim 1 wherein the supporting step is carried out by disposing the workpiece to be tested on a ring-shaped support, and wherein the force applying member used in the biasing step is a plunger.
Claim 4
Dependent Claim
41 words
A method of testing the adhesion of a coating as defined in claim 2 further comprising: making a chart record of the force-deflection curve; and testing a plurality of coated substrates to determine maximum and minimum values of the coating adhesion.
References Cited (Backward Citations)
US1653714A
Cited
US2853875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |