US3553046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact resistant laminated spin bobbin
Assignee: Westinghouse Electric Corp
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Filing: 1968-01-02
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Granted: 1971-01-05
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Expires: 1988-01-02
Abstract
Abstract A NEW AND IMPROVED SAFETY INNER TUBULAR LINER IS INCORPORATED INTO A COMPOSITE LAMINATED TUBULAR VOIDLESS BOBBIN. THE INNER TUBULAR LINEAR IS MADE UP OF LAYERS OF CRESYLIC ACID-PHENOL FORMALDEHYDE RESIN AND COTTON FABRIC IMPREGNATED WITH CRESTYLIC ACID PHENOL FORMALDEHYDE RESIN. THE INNER TUBULAR LINEAR IS FORMED BY RESIN IMPREGNATING A COTTON SHEET MATERIAL, COATING THE IMPREGNATED SHEET ON ONE SIDE WITH AN ADDITIONAL AMOUNT OF THE RESIN, ADVANCING TO THE B STAGE, PASSING THE SHEET, RESIN COATING FACE UP, OVER A HOT ROLL AND WINDING ONTO A HEATED MANDREL.
Inventors
- 👤 Thomas G Crawford
- 👤 William E Kearse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:34
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |