Patent US3832078A successfully refreshed from Google Patents.
US3832078A
Expired / Lapsed
US
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Method and apparatus of manufacturing non-slip pavement blocks and product thereof
Assignee: Japan Non-Slip Pavement Co Inc
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Filing: 1972-08-18
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Granted: 1974-08-27
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Expires: 1992-08-18
Abstract
Abstract This invention relates to a method and apparatus for manufacturing pavement blocks and the product resulting therefrom in which said blocks have rubber tips projecting from the surfaces thereof, and includes inserting a perforated plate and introducing projection elements into the perforation and against the base plate, thereafter introducing filler material, compressing the ingredients, removing the compressed unit from, including the base, the frame and thereafter removing the base plate and perforated plate.
Inventors
- 👤 F Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
E; E01; E01C; E01C5/00; E01C5/22; E01C5/226; B; B28; B28B; B28B23/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A non-slip pavement block comprised of solidified material in the form of a three-dimensional unit with projections protruding from at least one surface thereof and wherein the projections are disposed along a wire net composed of rigid, straight wires arranged in a predetermined crossing pattern.
Claim 2
Dependent Claim
45 words
A non-slip pavement block comprised of solidified material in the form of a three-dimensional unit with projections protruding from at least one surface thereof and wherein the projections are disposed along a wire net composed of rigid, straight wires arranged in a predetermined crossing pattern.
Claim 3
Dependent Claim
45 words
A non-slip pavement block according to claim 1, wherein the projections are elements imbedded in the block to a predetermined distance and disposed on the wire net within the solidified material such that the intersectional points of wire elements of the net pierce a projection.
Claim 4
Dependent Claim
42 words
A non-slip pavement block according to claim 2, wherein the projection elements are rubber projectiles and the portions of the projections protruding from the surface of the block are disposed in a predetermined pattern on the surface from which said projections protrude.
Claim 5
Dependent Claim
30 words
A non-slip pavement block according to claim 3, wherein the solidified material is comprised of a second concrete mixture superimposed over a first concrete mixture from which the projections protrude.
Claim 6
Dependent Claim
25 words
A non-slip pavement block according to claim 4, wherein the first concrete mixture is hardened mortar or terrazzo and the second concrete mixture is concrete.
References Cited (Backward Citations)
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Cited
US1728991A
Cited
US1916461A
Cited
US2287844A
Cited
US3286421A
Cited
US3344570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |