Patent US4230762A successfully refreshed from Google Patents.
US4230762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt water-proofing material
Assignee: Mitsui Chemicals Inc
•
Filing: 1979-07-20
•
Granted: 1980-10-28
•
Expires: 1999-07-20
Abstract
Abstract An asphalt water-proofing material comprising a core impregnated with petroleum asphalt. The core is made of composite material including a non-woven fabric layer formed of long filaments of synthetic resin arranged in random fashion and a woven or knitted fabric layer. The non-woven fabric and woven or knitted fabric layers are connected together by needle-punching whereby the long filaments of the non-woven fabric layer are forced into the woven or knitted fabric layer to integrally connect these layers to form said core.
Inventors
- 👤 Hajime Iwasaki
- 👤 Kuninori Mizuta
- 👤 Yoshinori Kobayashi
- 👤 Tadayoshi Yoshikawa
- 👤 Kyouzi Muraoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
B; B32; B32B; B32B11/00; B32B11/02; D; D06; D06M; D06M15/00; D06M15/01; D06M15/17; B32B11/10; B32B5/00; B32B5/02; B32B5/022; B32B5/024; B32B5/026; B32B5/06; B32B5/22; B32B5/24; B32B5/26; D04; D04H; D04H3/00; D04H3/08; D04H3/10; D04H3/105; D04H3/14; D06N; D06N5/00; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/023; B32B2260/04; B32B2260/042; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/0276; B32B2262/0284; B32B2262/06; B32B2262/062; B32B2262/065; B32B2305/00; B32B2305/08; B32B2307/00; B32B2307/30; B32B2307/308; B32B2307/50; B32B2307/54; B32B2307/552; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2307/732; B32B2307/734; B32B2419/00; B32B2419/06; B32B2607/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/159; Y10T442/30; Y10T442/3707; Y10T442/3724; Y10T442/3764
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
An asphalt water-proofing material comprising a composite material including a non-woven fabric layer made of long filaments of synthetic resin arranged in random fashion and a woven or knitted fabric layer, said layers being connected together by needle-punching to form the integral composite material, and a petroleum asphalt saturating said composite material, said petroleum asphalt having softening point of 70°-120° C. and penetration of 10-60 at 25° C., said composite material and/or asphalt water-proofing material having tensile strength of at least 6 kg/10 mm width in longitudinal direction and at least 4 kg/10 mm width in lateral direction at the time of 3% elongation thereof and elongation of at least 50%, thereby providing superior crumpling-resistant, shrinkage-resistant, restoring, crack-resistant or other fatigue-resistant properties.
Claim 2
Dependent Claim
122 words
An asphalt water-proofing material comprising a composite material including a non-woven fabric layer made of long filaments of synthetic resin arranged in random fashion and a woven or knitted fabric layer, said layers being connected together by needle-punching to form the integral composite material, and a petroleum asphalt saturating said composite material, said petroleum asphalt having softening point of 70°-120° C. and penetration of 10-60 at 25° C., said composite material and/or asphalt water-proofing material having tensile strength of at least 6 kg/10 mm width in longitudinal direction and at least 4 kg/10 mm width in lateral direction at the time of 3% elongation thereof and elongation of at least 50%, thereby providing superior crumpling-resistant, shrinkage-resistant, restoring, crack-resistant or other fatigue-resistant properties.
Claim 3
Dependent Claim
25 words
An asphalt water-proofing material according to claim 1, in which said non-woven fabric is made of long filaments of polypropylene, polyethylene terephthalate or polytetramethylene terephthalate.
Claim 4
Dependent Claim
25 words
An asphalt water-proofing material according to claim 1, in which said woven or knitted fabric is made of hemp, polyethylene terephthalate or viscose rayon yarns.
Claim 5
Dependent Claim
37 words
An asphalt water-proofing material according to any of claims 1 to 3 in which the non-woven fabric layer is made of long filaments of polypropylene and the woven or knitted fabric layer is made of hemp yarns.
Claim 6
Dependent Claim
39 words
An asphalt water-proofing material according to any of claims 1 to 3, in which the non-woven fabric layer is made of long filaments of polyethylene terephthalate and the woven or knitted fabric layer is made of polyethylene terephthalate yarns.
Claim 7
Dependent Claim
36 words
An asphalt water-proofing material according to claim 4, in which the non-woven fabric layer has weight of 100-500 g/m 2 and the woven or knitted hemp yarn fabric layer has weight of 80-200 g/m 2 .
Claim 8
Dependent Claim
34 words
An asphalt water-proofing material according to claim 4, in which the woven or knitted fabric layer is a scrim made of No. 5-20 count hamp yarns woven at the density of 12-32 filaments/10 cm.
Claim 9
Dependent Claim
34 words
An asphalt water-proofing material according to claim 5, in which the non-woven fabric layer has weight of 100-500 g/m 2 and the woven or knitted fabric layer has weight of 15-75 g/m 2 .
Claim 10
Dependent Claim
46 words
An asphalt water-proofing material according to claim 5, in which the woven or knitted fabric layer is a scrim made of No. 10-30 count yarns woven at the density of 7-20/inch or a scrim made of 120-150 denier filaments woven at the density of 3-8 filaments/cm.
Claim 11
Dependent Claim
26 words
An asphalt water-proofing material according to claim 1, in which said petroleum asphalt includes blowing asphalt, compound asphalt, catalytic blowing asphalt, rubberized asphalt or resin-blended asphalt.
References Cited (Backward Citations)
US4035544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |