Patent US4344910A successfully refreshed from Google Patents.
US4344910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of water-hardening material
Assignee: DSM BV
•
Filing: 1979-04-02
•
Granted: 1982-08-17
•
Expires: 1999-04-02
Abstract
Abstract An improved process for the manufacture of reinforced shaped articles from water-hardening materials. A plurality of continuous networks of synthetic organic polymer material having at least two meshes per square centimeter are incorporated in said water-hardening materials as reinforcement. The networks are prepared by forming meshes in an unfibrillated film of the synthetic organic polymer material.
Inventors
- 👤 Jan M. J. M. Bijen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:25
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/07; E04C5/073; B; B28; B28B; B28B23/00; B28B23/0006; C; C04; C04B; C04B16/00; C04B16/12; Y; Y10; Y10S; Y10S264/00; Y10S264/81; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24281
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
70 words
An improved process for the manufacture of reinforced shaped articles from water-hardening materials, said improvement comprising incorporating in said water-hardening materials a plurality of continuous networks of synthetic organic polymer material having at least two meshes per square centimeter, said networks having been prepared by forming said meshes in an unfibrillated film of said synthetic organic polymer material in a manner so as to avoid forming meshes having sharp corners.
Claim 2
Dependent Claim
70 words
An improved process for the manufacture of reinforced shaped articles from water-hardening materials, said improvement comprising incorporating in said water-hardening materials a plurality of continuous networks of synthetic organic polymer material having at least two meshes per square centimeter, said networks having been prepared by forming said meshes in an unfibrillated film of said synthetic organic polymer material in a manner so as to avoid forming meshes having sharp corners.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said networks have at least three meshes per square centimeter.
Claim 4
Dependent Claim
16 words
The process of claim 2 wherein said networks have at least 10 meshes per square centimeter.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein said film has been stretched in at least one direction before forming said meshes therein.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein said film has a thickness of from 1 to 250 μm after being stretched.
Claim 7
Dependent Claim
15 words
The process of claim 5 wherein said film thickness ranges between 10 and 200 μm.
Claim 8
Dependent Claim
18 words
The process of claim 1 wherein said synthetic polymer material is primarily composed of at least one polyolefin.
Claim 9
Dependent Claim
23 words
The process of claim 7 wherein said at least one polyolefin is polypropylene having a melt index of from 3 to 9 dg/min.
Claim 10
Dependent Claim
23 words
The process of claim 7 wherein said at least one polyolefin is a polyethylene having a melt index of 0.01 to 10 dg/min.
Claim 11
Dependent Claim
23 words
The process of claim 1 wherein a portion said synthetic organic polymer material film is pushed aside so as to form said meshes.
Claim 12
Dependent Claim
26 words
The process of claim 1 wherein a portion of said synthetic organic plastic material film is removed by mechanical means so as to form said meshes.
Claim 13
Dependent Claim
21 words
The process of claim 1 wherein said film is stretched in at least one direction after the formation of said meshes.
Claim 14
Dependent Claim
44 words
The process of claim 1 wherein the number of meshes in said networks, and the number of networks incorporated in said water-hardening material are chosen such that the average number of meshes is at least 100 per cubic centimeter of said reinforced shaped article.
Claim 15
Dependent Claim
23 words
The process of claim 13 wherein said average number of meshes is at least 500 per cubic centimeter of said reinforced shaped article.
Claim 16
Dependent Claim
65 words
The process of claim 1 wherein said networks have been prepared from a film of a thermoplastic material by the steps of: plasticizing at least a portion of said film material by heating; forming a plurality of meshes in said film by pushing aside portions of said plasticized material; and stretching, in at least one direction, said film in which said meshes have been formed.
Claim 17
Dependent Claim
19 words
The process of claim 15 wherein, as a first step, said film is stretched in at least one direction.
Claim 18
Dependent Claim
40 words
The process of claim 16 wherein said plastericized material is pushed aside along the length of the film so as to form a thickened ridge, whereafter said film is stretched in a direction normal to the length of said film.
Claim 19
Dependent Claim
50 words
The process of claims 4, 12 or 16 wherein the total degree of stretching of said film prior to and subsequent to forming said meshes therein is 3 to 10 times in a lengthwise direction, and 5 to 15 times in the direction normal to the length of said film.
Claim 20
Dependent Claim
49 words
The process of claim 1 wherein said networks have been prepared from a film having incorporated therein filaments of a material that does not melt at or below the melting temperature of the synthetic organic polymer material of said film, said filaments being disposed lengthwise relative to said film.
Claim 21
Dependent Claim
36 words
The process of claim 19 wherein the synthetic organic polymer material of said film is polyethylene, and said filaments are made of a material selected from the group consisting of polypropylene, polyamide, polyester and combinations thereof.
Claim 22
Dependent Claim
35 words
The process of claim 19 wherein the synthetic organic polymer material of said film is polypropylene, and said filaments are made from a material selected from the group consisting of polyamide, polyester and combinations thereof.
References Cited (Backward Citations)
US838226A
Cited
US1353225A
Cited
US2358758A
Cited
US2669860A
Cited
US2551796A
Cited
US2850890A
Cited
US3324213A
Cited
US3137611A
Cited
US3092439A
Cited
US3405027A
Cited
US3376629A
Cited
US3454455A
Cited
GB1130612A
Cited
US4190692A
Cited
US3655501A
Cited
US3597890A
Cited
US3800492A
Cited
US3719736A
Cited
US3985599A
Cited
US4133928A
Cited
US3832267A
Cited
US3881489A
Cited
US4070427A
Cited
DE2517790A1
Cited
US4059713A
Cited
NL7707253A
Cited
US4168924A
Cited
US4134243A
Cited
US4267136A
Cited
US4242407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |