Patent US3808725A successfully refreshed from Google Patents.
US3808725A
Expired / Lapsed
US
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Fishing net having a large specific gravity
Assignee: Mitsui Kinzoku Co Ltd
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Filing: 1972-08-02
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Granted: 1974-05-07
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Expires: 1992-08-02
Abstract
Abstract A fishing net having a high specific gravity prepared by netting monofilaments of a hollow thermoplastic synthetic resin sheath containing spaced-apart fiber segments of a metal or a metal alloy. The segments have a high specific gravity, such as in lead or lead alloys, and are enclosed therein as the core, or twines of such monofilaments. Voids are located within the sheath between adjacent ends of the segments. The net may also comprise compound twines consisting of the foregoing monofilaments and monofilaments of natural or chemical fibers.
Inventors
- 👤 A Matsumoto
- 👤 K Someno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:50
CPC Classifications
A; A01; A01K; A01K75/00; D; D07; D07B; D07B2201/00; D07B2201/10; D07B2201/1024; D07B2201/20; D07B2201/2001; D07B2201/2014; D07B2201/2047; D07B2201/2052; D07B2201/2064; D07B2501/00; D07B2501/20; D07B2501/2038
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
23 words
A fishnet according to claim 1, in which said net consists essentially of said filaments which are netted together to form the net.
Claim 2
Dependent Claim
26 words
A fishnet according to claim 1, in which said filaments are twined together to form twines and the twines are netted together to form the net.
Claim 3
Dependent Claim
31 words
A fishnet according to claim 1, in which said filaments are twined together with natural or synthetic fibers to form twines and the twines are netted together to form the net.
Claim 4
Dependent Claim
21 words
A fishnet according to claim 4, wherein the diameter of said filaments is substantially equal to the diameter of said fibers.
Claim 5
Dependent Claim
21 words
A fishnet according to claim 4, wherein the synthetic resin constituting said filaments and the synthetic fibers are the same resin.
Claim 6
Dependent Claim
33 words
A fishnet according to claim 1, wherein said metal or metal alloy is at least one member selected from the group consisting of lead, lead alloys, tin, tin alloys, bismuth and bismuth alloys.
Claim 7
Dependent Claim
24 words
A fishnet according to claim 1, wherein said thermoplastic resin is selected from the group consisting of polyethylene, polypropylene, polyamide, polyvinylidene chloride and polyester.
References Cited (Backward Citations)
US2590586A
Cited
GB724598A
Cited
US2894366A
Cited
US3153297A
Cited
US3334436A
Cited
US3451305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |