Patent US4168335A successfully refreshed from Google Patents.
US4168335A
Expired / Lapsed
US
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Underwater terrain reinforcement matting
Assignee: Akzona Inc
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Filing: 1978-02-22
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Granted: 1979-09-18
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Expires: 1998-02-22
Abstract
Abstract A matting is disclosed for reinforcing underwater terrains. The matting is made of sections of looped intersecting synthetic polymer filaments bonded to one another at their points of intersection, at least one section being temporarily buoyant in water. The matting disclosed may be towed into position and then submerged.
Inventors
- 👤 Jan G. Vos
- 👤 Berthold H. Daimler
- 👤 Wilhelm Herveling
- 👤 Alfred Birker
- 👤 Siegfried Langefeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:44
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/122; Y; Y10; Y10T; Y10T428/00; Y10T428/17; Y10T428/19; Y10T428/192; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
An underwater terrain reinforcement matting comprising a series of linearly connected open, low density nonwoven bodies interconnected with at least one nonwoven body which is temporarily buoyant in water, said nonwoven bodies consisting essentially of a plurality of looped, intersecting synthetic polymer filaments selected from the group consisting of polyolefin, polyester, and nylon which are adhered to one another at their points of intersection.
Claim 2
Dependent Claim
64 words
An underwater terrain reinforcement matting comprising a series of linearly connected open, low density nonwoven bodies interconnected with at least one nonwoven body which is temporarily buoyant in water, said nonwoven bodies consisting essentially of a plurality of looped, intersecting synthetic polymer filaments selected from the group consisting of polyolefin, polyester, and nylon which are adhered to one another at their points of intersection.
Claim 3
Dependent Claim
23 words
The reinforcement matting of claim 1 wherein said synthetic polymer filaments have a specific gravity of 0.90 to 1.38 grams per cubic centimeter.
Claim 4
Dependent Claim
23 words
The reinforcement matting of claim 2 wherein said synthetic polymer filaments have a specific gravity of 1.04 to 1.15 grams per cubic centimeter.
Claim 5
Dependent Claim
21 words
The reinforcement matting of claim 1 wherein said temporarily buoyant section is elongated and of circular configuration transverse to said elongation.
Claim 6
Dependent Claim
19 words
The reinforcement matting of claim 4 wherein said temporarily buoyant section is of cylindrical configuration transverse to said elongation.
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) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |