US3825646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacturing of rackets for tennis and other similar games
Assignee: CALLENELLE USINES
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Filing: 1972-04-14
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Granted: 1974-07-23
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Expires: 1992-04-14
Abstract
Abstract On a core which is stretched in a straight line and has a length corresponding to the periphery of a racket, including the parts of the handle, reinforcing tapes are wound where necessary a fibre material parallel to the core. The core is bent so as to impart to it the form of a racket blank. The materials applied onto the core are impregnated with pre-polymerized synthetic material, either before or after the bending. The blank is places in a mould so as to give the racket the final shape and to bring about the final polymerization of the pre-polymerized material.
Inventors
- 👤 R Delmotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:38
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/10; A63B60/00; A63B2209/00; A63B2209/02; A63B2209/023; A63B49/11; A63B60/06; A63B60/14
Claims Analysis
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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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |