US3660136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating slotted articles
Assignee: General Electric Co
•
Filing: 1970-11-23
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Granted: 1972-05-02
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Expires: 1990-11-23
Abstract
Abstract A method of applying a powdered coating composition to solid slotted articles comprising the steps of: preheating the article to the sintering temperature of the composition, coating the article in a conventional fluidized bed of the coating composition, cooling the article to ambient temperature, and coating the article in an electrostatic fluidized bed of the coating composition. The method may advantageously be utilized to apply an integral insulation to the deep, narrow winding slots of a dynamoelectric machine armature or stator.
Inventors
- 👤 Lawrence J Guilbault
- 👤 David G Schwenker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:46
CPC Classifications
B; B05; B05C; B05C19/00; B05C19/02; B05C19/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A method of applying a substantially uniform layer of fusible powdered coating composition containing particles therein which sinter when heated to an article having slots therein characterized by a slot width of less than 1 inch and a slot depth to width ratio of at least 4 to 1, said method comprising the steps of: a. coating the slotted article in an electrostatic fluidized bed of the powdered coating composition; b. heating the coated slotted article to at lEast the sintering temperature of the coating particles but below the deterioration temperature of the article; c. coating the coated slotted article in a conventional fluidized bed of the coating composition.
Claim 2
Dependent Claim
29 words
The method of claim 2, further comprising the step of fusing the coating composition after the article has been coated in the electrostatic fluidized bed of the coating composition.
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |