Patent US5135852A successfully refreshed from Google Patents.
Patent US5098218A successfully refreshed from Google Patents.
US5098218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and article of manufacture for removable pavement for underground utility placement
Assignee: BULL DOG CONSTRUCTION Co Inc A CORP OF PA
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Filing: 1990-07-09
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Granted: 1992-03-24
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Expires: 2010-07-09
Abstract
Abstract Removable sidewalk and a method of installation involves preformed sidewalk slabs provided with interlocking means at two opposite ends. The slabs include attachment means for lifting the slabs into place. The slabs may be installed over utility services to form a sidewalk and removed and replaced as necessary to provide access to the underground utilities.
Inventors
- 👤 Robert W. Reese
- 👤 Stephen W. Keech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:50
CPC Classifications
E; E01; E01C; E01C5/00; E01C5/005; E01C2201/00; E01C2201/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
95 words
An article of manufacture for providing a sidewalk, comprising: a plurality of sidewalk slabs provided with interlocking means provided for two opposite edges, said interlocking means adapted and configured to maintain the edges of adjacent slabs in engagement with restricted movement, one with respect to the other, each slab being provided with means for the attachment of a lifting means, wherein said mans for attachment comprises means extending from the lateral sides of the sidewalk slab, said means being formed into the slab and said means being adapted to have a lifting hook connected thereto.
Claim 2
Dependent Claim
95 words
An article of manufacture for providing a sidewalk, comprising: a plurality of sidewalk slabs provided with interlocking means provided for two opposite edges, said interlocking means adapted and configured to maintain the edges of adjacent slabs in engagement with restricted movement, one with respect to the other, each slab being provided with means for the attachment of a lifting means, wherein said mans for attachment comprises means extending from the lateral sides of the sidewalk slab, said means being formed into the slab and said means being adapted to have a lifting hook connected thereto.
Claim 3
Dependent Claim
16 words
An article of manufacture in accordance with claim 1 wherein said slabs are rectangular in shape.
Claim 4
Dependent Claim
16 words
An article of manufacture in accordance with claim 1 wherein said slabs are constructed of concrete.
Claim 5
Dependent Claim
21 words
An article of manufacture in accordance with claim 1 wherein said interlocking means is comprised of interlocking shapes comprised of concrete.
Claim 6
Dependent Claim
68 words
An article of manufacture in accordance with claim 1 wherein said interlocking means is comprised of the same material as the sidewalk slab, said interlocking means being in the shape of an upwardly directed channel at one end and a downwardly directed channels at the opposite end of the slab thereby enabling removal of each individual slab after installation utilizing said means for attachment of a lifting means.
Claim 7
Dependent Claim
108 words
An article of manufacture for providing a sidewalk, comprising: a plurality of sidewalk slabs provided with interlocking means provided for two opposite edges, said interlocking means adapted and configured to maintain the edges of adjacent slabs in engagement with restricted movement, one with respect to the other, each slab being provided with means for the attachment of a lifting means, wherein said interlocking means is comprised of a substantially U-shaped pin, a portion of which is adapted to fit into a groove in said concrete slab, said groove being in the end of said slab and said substantially U-shaped pin being adapted to bridge two adjacent concrete slabs.
Claim 8
Dependent Claim
108 words
An article of manufacture for providing a sidewalk, comprising: a plurality of sidewalk slabs provided with interlocking means provided for two opposite edges, said interlocking means adapted and configured to maintain the edges of adjacent slabs in engagement with restricted movement, one with respect to the other, each slab being provided with means for the attachment of a lifting means, wherein said interlocking means is comprised of a substantially U-shaped pin, a portion of which is adapted to fit into a groove in said concrete slab, said groove being in the end of said slab and said substantially U-shaped pin being adapted to bridge two adjacent concrete slabs.
Claim 9
Dependent Claim
17 words
An article of manufacture in accordance with claim 6 wherein said means for attachment comprises lifting hooks.
Claim 10
Dependent Claim
26 words
An article of manufacture in accordance with claim 6 wherein said means for attachment of a lifting means is comprised of holes formed in said slabs.
Claim 11
Independent Claim
99 words
A method of installing public utility access means to a building under a sidewalk, comprising the steps of: installing the necessary public utility access means in the ground in the area where the sidewalk is to be placed; providing a plurality of sidewalk slabs each having a pair of interlocking means provided for opposite ends of each slab; and lifting said slabs into position to form a sidewalk in such manner to provide and enable the adjacent edges of adjacent slabs to be interlocked in place whereby said slabs may be removed later as needed by lifting and replaced.
Claim 12
Independent Claim
99 words
A method of installing public utility access means to a building under a sidewalk, comprising the steps of: installing the necessary public utility access means in the ground in the area where the sidewalk is to be placed; providing a plurality of sidewalk slabs each having a pair of interlocking means provided for opposite ends of each slab; and lifting said slabs into position to form a sidewalk in such manner to provide and enable the adjacent edges of adjacent slabs to be interlocked in place whereby said slabs may be removed later as needed by lifting and replaced.
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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) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |