US4310157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis racket
Assignee: Head Sport GmbH
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Filing: 1980-03-03
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Granted: 1982-01-12
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Expires: 2000-03-03
Abstract
Abstract A short tennis racket having an oblong, oval shaped head.
Inventors
- 👤 Louis E. Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:33
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/022; A63B60/00; A63B60/06; A63B60/14; A63B2049/0201; A63B2049/0203; A63B2049/0204; A63B2049/0207; A63B2049/0212; A63B49/03; Y; Y10; Y10S; Y10S273/00; Y10S273/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A tennis racket comprising a single piece unitary hollow tubular frame constructed from blended graphite-fiberglass composite, said frame comprising a loop portion and a handle portion interconnected by an integral open throat portion, a part of said throat portion comprising a continuation of said loop portion to make said loop portion an enclosed open loop, an outer circumferential stringing groove formed in said loop portion, stringing holes formed in said groove and throat portion part, tennis racket strings extending through said holes lengthwise and crosswise said enclosed open loop, all of said loop, handle and throat portions and said tennis strings being coplanar, said enclosed open loop having an oblong oval shape, said length-wise strings being about 14" long and said crosswise strings being about 8" long whereby the ratio of the length to the width of the inner strung area of said oblong oval shape is about 1.75 to 1, the strung weight of the racket being of the order of 300 to 345 grams, and the overall length of the racket being of the order of 23 to 26 inches.
Claim 2
Dependent Claim
182 words
A tennis racket comprising a single piece unitary hollow tubular frame constructed from blended graphite-fiberglass composite, said frame comprising a loop portion and a handle portion interconnected by an integral open throat portion, a part of said throat portion comprising a continuation of said loop portion to make said loop portion an enclosed open loop, an outer circumferential stringing groove formed in said loop portion, stringing holes formed in said groove and throat portion part, tennis racket strings extending through said holes lengthwise and crosswise said enclosed open loop, all of said loop, handle and throat portions and said tennis strings being coplanar, said enclosed open loop having an oblong oval shape, said length-wise strings being about 14" long and said crosswise strings being about 8" long whereby the ratio of the length to the width of the inner strung area of said oblong oval shape is about 1.75 to 1, the strung weight of the racket being of the order of 300 to 345 grams, and the overall length of the racket being of the order of 23 to 26 inches.
References Cited (Backward Citations)
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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) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |