US4991343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preventing the spread of vegetation
Assignee: Individual
•
Filing: 1989-10-18
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Granted: 1991-02-12
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Expires: 2009-10-18
Abstract
Abstract A process for preventing the spread of vegetation from one area to another is disclosed. In the first step of this process, a vegetation-encroachment barrier is provided. The barrier preferably contains two halves which are joined at their bottoms, whose tops are normally touching each other, but whose tops may be separated from each other. The two halves of the device are so shaped that, when their tops and bottoms are contiguous, a chamber between them is defined; the chamber exists at a location intermediate the tops and bottoms of the halves. In the second step of the process, a furrow is dug around the area to be protected. Thereafter, the barrier is inserted into the furrow.
Inventors
- 👤 Thomas R. Wait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:10
CPC Classifications
A; A01; A01G; A01G20/00; A01G20/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
257 words
A process for preventing the spread of vegetation from one area to another, comprising the steps of: (a) providing a flexible, in-ground plastic, vegetation-encroachment barrier comprised of at least a first wall and a second wall, wherein: (1) each of said first wall and said second wall comprises a bottom portion and a top portion and has a thickness of from about 0.05 to about 0.09 inches; (2) said vegetation-encroachment barrier is comprised of means for attaching said bottom portions of said first wall and said second wall to each other; (3) the bottom portion of said first wall is attached to the bottom portion of said second wall, and the top portion of said first wall is contiguous with and separable from the top portion of said second wall; (4) said first wall and said second wall are so configured that, when the bottom portion of said first wall is contiguous with the bottom portion of said second wall, and when the top portion of said first wall is contiguous with the top portion of said second wall, a chamber is defined by said first wall, which chamber is intermediate between the tops of said walls and the bottoms of said walls; (b) providing a means for separating vegetation; (c) disposing said means for separating vegetation between said first wall and said second wall and, simultaneously, separating said top of said first wall from said top of said second wall; and (d) moving said means for separating vegetation between said first wall and said second wall.
Claim 2
Dependent Claim
257 words
A process for preventing the spread of vegetation from one area to another, comprising the steps of: (a) providing a flexible, in-ground plastic, vegetation-encroachment barrier comprised of at least a first wall and a second wall, wherein: (1) each of said first wall and said second wall comprises a bottom portion and a top portion and has a thickness of from about 0.05 to about 0.09 inches; (2) said vegetation-encroachment barrier is comprised of means for attaching said bottom portions of said first wall and said second wall to each other; (3) the bottom portion of said first wall is attached to the bottom portion of said second wall, and the top portion of said first wall is contiguous with and separable from the top portion of said second wall; (4) said first wall and said second wall are so configured that, when the bottom portion of said first wall is contiguous with the bottom portion of said second wall, and when the top portion of said first wall is contiguous with the top portion of said second wall, a chamber is defined by said first wall, which chamber is intermediate between the tops of said walls and the bottoms of said walls; (b) providing a means for separating vegetation; (c) disposing said means for separating vegetation between said first wall and said second wall and, simultaneously, separating said top of said first wall from said top of said second wall; and (d) moving said means for separating vegetation between said first wall and said second wall.
Claim 3
Dependent Claim
15 words
The process as recited in claim 1, wherein said plastic is a synthetic addition product.
Claim 4
Dependent Claim
25 words
The process as recited in claim 2, wherein said vegetation encroachment barrier is comprised of at least about 90 weight percent of a thermoplastic material.
Claim 5
Dependent Claim
16 words
The process as recited in claim 3, wherein said thermoplastic material consists essentially of poly(vinyl chloride).
Claim 6
Dependent Claim
15 words
The process as recited in claim 3, wherein said thermoplastic material consists essentially of polypropylene.
Claim 7
Dependent Claim
15 words
The process as recited in claim 3, wherein said thermoplastic material consists essentially of polyethylene.
Claim 8
Dependent Claim
184 words
A flexible plastic, vegetation-encroachment barrier comprised of at least a first wall and a second wall, wherein: (a) each of said first wall and said second wall comprises a bottom portion and a top portion and has a thickness of from about 0.05 to about 0.09 inches: (b) said vegetation-encroachment barrier is comprised of means for attaching said bottom portions of said first wall and said second wall to each other; (c) the bottom portion of said first wall is contiguous with the bottom portion of said second wall, and the top portion of said first wall is contiguous with and separable from the top portion of said second wall; and (d) said first wall and said second wall are so configured that, when the bottom portion of said first wall is cintiguous with the bottom portion of said second wall, and when the top portion of said first wall is contiguous with the top portion of said second wall, a chamber is defined by said first wall, which chamber is intermediate between the tops of said walls and the bottoms of said walls.
Claim 9
Dependent Claim
184 words
A flexible plastic, vegetation-encroachment barrier comprised of at least a first wall and a second wall, wherein: (a) each of said first wall and said second wall comprises a bottom portion and a top portion and has a thickness of from about 0.05 to about 0.09 inches: (b) said vegetation-encroachment barrier is comprised of means for attaching said bottom portions of said first wall and said second wall to each other; (c) the bottom portion of said first wall is contiguous with the bottom portion of said second wall, and the top portion of said first wall is contiguous with and separable from the top portion of said second wall; and (d) said first wall and said second wall are so configured that, when the bottom portion of said first wall is cintiguous with the bottom portion of said second wall, and when the top portion of said first wall is contiguous with the top portion of said second wall, a chamber is defined by said first wall, which chamber is intermediate between the tops of said walls and the bottoms of said walls.
Claim 10
Dependent Claim
15 words
The barrier as recited in claim 7, wherein said plastic is a synthetic addition product.
Claim 11
Dependent Claim
25 words
The barrier as recited in claim 8, wherein said vegetation encroachment barrier is comprised of at least about 90 weight percent of a thermoplastic material.
Claim 12
Dependent Claim
16 words
The barrier as recited in claim 9, wherein said thermoplastic material consists essentially of poly(vinyl chloride).
Claim 13
Dependent Claim
15 words
The barrier as recited in claim 9, wherein said thermoplastic material consists essentially of polypropylene.
Claim 14
Dependent Claim
15 words
The barrier as recited in claim 9, wherein said thermoplastic material consists essentially of polyethylene.
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) | 1994-02-11 | 1994-08-13 | 1995-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-11 | 1998-08-13 | 1999-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-11 | 2002-08-13 | 2003-02-12 | $7700.00 | Window Closed / Lapsed |