US2568847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating wire-wound electrical resistors
Assignee: EIDP Inc
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Filing: 1946-07-09
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Granted: 1951-09-25
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Expires: 1966-07-09
Abstract
No abstract record available.
Inventors
- 👤 Alden J Deyrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:30
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/10; H01C; H01C17/00; H01C17/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE PRODUCTION OF VITREOUS ENAMEL COATED, WIRE-WOUND ELECTRICAL RESISTORS CONTAINING A CERAMIC CORE THE STEPS COMPRISING ALTERNATELY APPLYING AND FIRING AT LEAST THREE SUCCESSIVE COATS OF VITREOUS ENAMEL ON THE WIRE-WOUND CORE, FIRING THE FIRST COAT AT A TIME AND TEMPERATURE TO PRODUCE A SMOOTH, GLOSSY SURFACE, FIRING EVERY ADDITIONAL COAT, EXCEPT THE LAST COAT, AT A TIME AND TEMPERATURE TO SINTER AND BOND THE ENAMEL PARTICLES TO FORM A SOLID, POROUS SURFACE, AND FIRING THE LAST COAT TO FORM ALL OF THE APPLIED ANAMEL INTO A SMOOTH, EVEN, GLOOSY COATING.
Claim 2
Dependent Claim
92 words
IN THE PRODUCTION OF VITREOUS ENAMEL COATED, WIRE-WOUND ELECTRICAL RESISTORS CONTAINING A CERAMIC CORE THE STEPS COMPRISING ALTERNATELY APPLYING AND FIRING AT LEAST THREE SUCCESSIVE COATS OF VITREOUS ENAMEL ON THE WIRE-WOUND CORE, FIRING THE FIRST COAT AT A TIME AND TEMPERATURE TO PRODUCE A SMOOTH, GLOSSY SURFACE, FIRING EVERY ADDITIONAL COAT, EXCEPT THE LAST COAT, AT A TIME AND TEMPERATURE TO SINTER AND BOND THE ENAMEL PARTICLES TO FORM A SOLID, POROUS SURFACE, AND FIRING THE LAST COAT TO FORM ALL OF THE APPLIED ANAMEL INTO A SMOOTH, EVEN, GLOOSY COATING.
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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |