US3246271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper insulation for transformers
Assignee: Westinghouse Electric Corp
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Filing: 1965-04-16
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Granted: 1966-04-12
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Expires: 1985-04-16
Abstract
No abstract record available.
Inventors
- 👤 James G Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:28
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/48; H01B3/485; H01B3/30; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/323; H01F27/324
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
AN ARTICLE OF MANUFACTURE COMPRISING, A LONGITUDINAL SHEET OF FIBROUS CELLULOSIC ELECTRICAL INSULATION MATERIAL FOR ISULATING ELECTRICAL APPARATUS, A TACK FREE RESINOUS ADHESIVE COATING APPLIED TO AT LEAST ONE SURFACE OF SAID SHEET, SAID RESINOUS ADHESIVE ONLY PARTIALLY PENETRATING SAID SHEET, SAID RESINOUS ADHESIVE COATING BEING APPLIED IN DISCRETE AREAS IN EACH OF WHICH THE MAXIMUM DISTANCE FROM ANY POINT IN AN AREA TO THE NEAREST EDGE OF SAID AREA DOES NOT EXCEED 3/4 INCH, AND THE OCCURRENCE OF SAID RESINOUS ADHESIVE COATED DISCRETE AREAS IS OF SUCH MAGNITUDE THAT FROM 25% TO 75% OF THE AREA OF SAID AT LEAST ONE SURFACE OF SAID SHEET IS COATED WITH SAID RESINOUS ADHESIVE.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |