Patent US4206531A successfully refreshed from Google Patents.
Patent US4696134A successfully refreshed from Google Patents.
US4696134A
Expired / Lapsed
US
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Device for marking out land
Assignee: Individual
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Filing: 1986-07-01
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Granted: 1987-09-29
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Expires: 2006-07-01
Abstract
Abstract A device for marking out land includes a stake of flexible plastics material including a stem which has a point at its lower end and which is extended in its upper part by a marker head. The stem has an upper region which is less rigid than the lower region which is adapted to be driven into the ground.
Inventors
- 👤 Robert Neaume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:32
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/02; G01C15/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A device for marking out land, in particular agricultural land, said device comprising a stake of flexible plastics material including a stem which has a point at a lower end thereof and which is extended at an upper end thereof by a marker head formed integrally with said stem, said stem having an upper region integral with said marker head and a lower region including said point and adapted to be driven into the ground, said upper region being less rigid than said lower region, said lower region of said stem having a cross-shaped section defined by a first arm extending longitudinally of said stem up to said marker head with a gradually increasing width in the direction of said marker head, and a second arm which crosses said first arm in section and which tapers out at least in the vicinity of said marker head.
Claim 2
Independent Claim
146 words
A device for marking out land, in particular agricultural land, said device comprising a stake of flexible plastics material including a stem which has a point at a lower end thereof and which is extended at an upper end thereof by a marker head formed integrally with said stem, said stem having an upper region integral with said marker head and a lower region including said point and adapted to be driven into the ground, said upper region being less rigid than said lower region, said lower region of said stem having a cross-shaped section defined by a first arm extending longitudinally of said stem up to said marker head with a gradually increasing width in the direction of said marker head, and a second arm which crosses said first arm in section and which tapers out at least in the vicinity of said marker head.
Claim 3
Dependent Claim
21 words
A device according to claim 1, wherein said marker head is substantially planar and is an extension of said first arm.
Claim 4
Dependent Claim
27 words
A device according to claim 2, wherein said marker head has a rigidity at the most equal to the rigidity of said upper region of said stem.
Claim 5
Dependent Claim
19 words
A device according to claim 1, wherein said plastics material of the whole of said stake is a polyolefin.
Claim 6
Dependent Claim
28 words
A device according to claim 4, wherein said polyolefin has a density of 0.90 to 0.96 and a tensile strength of 8.10 6 Pa to 35.10 6 Pa.
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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) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |