Patent US3899856A successfully refreshed from Google Patents.
US3899856A
Expired / Lapsed
US
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Property boundary marker
Assignee: Individual
•
Filing: 1974-06-03
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Granted: 1975-08-19
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Expires: 1994-06-03
Abstract
Abstract A property boundary marker which can be driven into the ground because it is designed to have no substantial horizontal surfaces but which can be interlocked with additional sections to provide increased length by means of interlocking tabs which hold each section to the next. The marker is formed from two intersecting planar cast iron members having slots therein so that external forces fracture the plates of the marker rather than move it.
Inventors
- 👤 John David Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:11
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/02; G01C15/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
175 words
A property boundary marker adapted to be driven into the ground comprising a main column with a driving head at one end and a point at the other end, said main column being formed from at least two generally planar members intersecting each other generally along the axis of said main column, which axis extends from said head to said point, and at least one secondary column also formed from intersecting planar members and having a point at one end and interlocking means at the other end, said interlocking means comprising tabs extending from the ends of some of the planar members of the secondary column generally along said axis so as to lay alongside the planar members of said main column adapted to receive the point of said main column therein with the planar members of the main column generally in alignment with the planar members of said secondary column, at least one of said secondary column planar members being cut in at an angle to receive the pointed end of the other column.
Claim 2
Dependent Claim
175 words
A property boundary marker adapted to be driven into the ground comprising a main column with a driving head at one end and a point at the other end, said main column being formed from at least two generally planar members intersecting each other generally along the axis of said main column, which axis extends from said head to said point, and at least one secondary column also formed from intersecting planar members and having a point at one end and interlocking means at the other end, said interlocking means comprising tabs extending from the ends of some of the planar members of the secondary column generally along said axis so as to lay alongside the planar members of said main column adapted to receive the point of said main column therein with the planar members of the main column generally in alignment with the planar members of said secondary column, at least one of said secondary column planar members being cut in at an angle to receive the pointed end of the other column.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 including slots in some of said planar members so as to form preferred fracture points in the columns.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1 in which there are a plurality of secondary columns.
Claim 5
Dependent Claim
14 words
The apparatus of claim 2 in which there are a plurality of secondary columns.
Claim 6
Dependent Claim
36 words
The apparatus of claim 4 including indexing means on the interlocking ends of the columns to insure that each successive secondary column is mounted at a predetermined angle about said axis relative to the preceding column.
Claim 7
Dependent Claim
36 words
The apparatus of claim 5 in which said indexing means comprises another tab on the end of the secondary member adapted to fit into a notch in the pointed end of one of the planar members.
Claim 8
Dependent Claim
46 words
The apparatus of claim 4 in which the planar members at the interlocking ends of the secondary columns cut in at an angle to receive the pointed end of the previous column utilize an angle slightly greater than the angle subtended by the pointed planar members.
Claim 9
Dependent Claim
40 words
The apparatus of claim 1 in which said planar members cut in at an angle to receive the pointed end of the other column are cut at an angle slightly greater than the angle subtended by the pointed planar members.
References Cited (Backward Citations)
US1399426A
Cited
US1672927A
Cited
US2349110A
Cited
US2955430A
Cited
US3352120A
Cited
US3685237A
Cited
US3748795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |