US3245015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coverings of coil windings of electrical apparatus
Assignee: Pinchin Johnson and Associates Ltd
•
Filing: 1962-07-23
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Granted: 1966-04-05
•
Expires: 1982-07-23
Abstract
No abstract record available.
Inventors
- 👤 Tanner Edward Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:44
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/48; H01B3/02; H01B3/04; H01F; H01F5/00; H01F5/06; H02; H02K; H02K3/00; H02K3/32; H02K3/325; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A CURVED ELECTRICAL COIL, THE INDIVIDUAL TURNS OF WHICH ARE ENAMEL INSULATED HAVING OVER THE OUTER TURNS OF THE COIL A SLIP COATING COMPRISING A POWDER SELECTED FROM THE GROUP CONSISTING OF ASBESTINE, DIATOMACEOUS EARTH, MICA, TALC, AND CHINA CLAY AND A BINDER OF CELLULOSE ETHER SELECTED FROM THE GROUPS CONSISTING OF ETHYL HYDROXYETHYL CELLULOSE, METHYL CELLULOSE, HYDROXYETHYL METHYL CELLULOSE AND METHYL ETHYL CELLULOSE, THE SLIP COATING ENTERING THE INTERSTICES BETWEEN AT LEAST THE OUTSIDE TURNS OF THE COIL SO AS TO REDUCE THE SURFACE IRREGULARITIES OF THE COIL SURFACE, AND HAVING OVER THE SLIP COATING AN OUTER RELATIVELY STRONG, FLEXIBLE SKIN.
References Cited (Backward Citations)
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Cited
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |