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US3050431A
Expired / Lapsed
US
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Manufacture of tennis strings
Assignee: Ashaway Line and Twine Manufacturing Co
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Filing: 1958-07-07
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Granted: 1962-08-21
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Expires: 1978-07-07
Abstract
No abstract record available.
Inventors
- 👤 Julian T Crandall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:20
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/02; A; A63; A63B; A63B51/00; A63B51/02; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; B29C70/28; B29C70/40; B29C70/50; B29C70/52; D02; D02G; D02G3/00; D02G3/44; D02G3/444; D07B1/14; D07B1/16; D07B1/165; D07B2207/00; D07B2207/40; D07B2207/404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF MANUFACTURING AN INTEGRATED PLASTIC STRING OF THE CHARACTER DESCRIBED, COMPRISING THE FOLLOWING STEPS: (A) TAKING A FLEXIBLE THERMOPLASTIC CORE; (B) WINDING A THERMOPLASTIC STRAND AROUND SAID CORE TO PROVIDE AN ARMOR SHEATH THEREOVER; AND (C) DRAWING THE COMPOSITE CORE AND SHEATH IN A DRY STATE THROUGH A HEATED DIE HAVING AN ORIFICE OF LESSER DIAMETER THAN THAT OF THE COMPOSITE STRING, SAID STRING BEING INTEGRATED UPON REMOVAL FROM THE DIE.
Claim 2
Independent Claim
73 words
THE METHOD OF MANUFACTURING AN INTEGRATED PLASTIC STRING OF THE CHARACTER DESCRIBED, COMPRISING THE FOLLOWING STEPS: (A) TAKING A FLEXIBLE THERMOPLASTIC CORE; (B) WINDING A THERMOPLASTIC STRAND AROUND SAID CORE TO PROVIDE AN ARMOR SHEATH THEREOVER; AND (C) DRAWING THE COMPOSITE CORE AND SHEATH IN A DRY STATE THROUGH A HEATED DIE HAVING AN ORIFICE OF LESSER DIAMETER THAN THAT OF THE COMPOSITE STRING, SAID STRING BEING INTEGRATED UPON REMOVAL FROM THE DIE.
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) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |