US3933546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for draining water or moisture from substratum for waterproofing layer
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1974-07-19
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Granted: 1976-01-20
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Expires: 1994-07-19
Abstract
Abstract A method for draining water or moisture from a substratum for a waterproofing layer in buildings comprising applying to the substratum such as concrete or mortar a sintered product of a thermoplastic resin, having a capillary structure comprising numeral, fine and interconnecting pores and voids of 20 to 70 percent, selected from the group consisting of a sintered plate and a sintered hollow product in a form of a belt or tube, wherein at least a part of the sintered product is protruded into the atmosphere and applying thereto a waterproofing layer, and thereby making the water or moisture contained in the substratum evaporate through the sintered product.
Inventors
- 👤 Hidekiyo Gohda
- 👤 Takashi Kiku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:19
CPC Classifications
E; E04; E04D; E04D11/00; E04D11/02; E04B; E04B1/00; E04B1/62; E04B1/70; E04D13/00; E04D13/04; E04D13/0404; E04D13/17; E04D7/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
A method for draining water or moisture from a substratum for a waterproofing layer in buildings, which comprises applying to the substratum a sintered product of a thermoplastic resin, having a capillary structure comprising numeral, fine and interconnecting pores and voids of 20 to 70 percent, selected from the group consisting of a sintered plate and a sintered hollow product in the form of a belt or tube, wherein at least a part of the sintered product is protruded into the atmosphere, and applying thereto a waterproofing layer, and thereby making the water or moisture contained in the substratum evaporate through the sintered product.
Claim 2
Independent Claim
104 words
A method for draining water or moisture from a substratum for a waterproofing layer in buildings, which comprises applying to the substratum a sintered product of a thermoplastic resin, having a capillary structure comprising numeral, fine and interconnecting pores and voids of 20 to 70 percent, selected from the group consisting of a sintered plate and a sintered hollow product in the form of a belt or tube, wherein at least a part of the sintered product is protruded into the atmosphere, and applying thereto a waterproofing layer, and thereby making the water or moisture contained in the substratum evaporate through the sintered product.
Claim 3
Dependent Claim
47 words
The method according to claim 1, wherein the sintered product is prepared by spreading a thermoplastic resin powder on a heat resistant carrier by a knife or roll to form a powder layer and then heating it to fuse the powder particles at the contact interface thereof.
Claim 4
Dependent Claim
13 words
The method according to claim 2, wherein the knife or roll has channels.
Claim 5
Dependent Claim
81 words
The method according to claim 2, wherein the sintered hollow product is prepared by spreading a thermoplastic resin powder on a heat resistant carrier by a knife or roll having channels to form a powder layer, heating it to fuse the powder particles at the contact interface thereof, and then laminating the resulting sintered plate having raised portions at the surface with another sintered plate or with a plain plate wherein the surface having the raised portions becomes the inner face.
Claim 6
Dependent Claim
36 words
The method according to claim 1, wherein the thermoplastic resin is a member selected from the group consisting of polyvinyl chloride, a vinyl chloride copolymer and a graft copolymer of vinyl chloride with ethylene-vinyl acetate copolymer.
Claim 7
Dependent Claim
49 words
The method according to claim 5, wherein the vinyl chloride copolymer is a copolymer of vinyl chloride with a monomer selected from the group consisting of vinylidene chloride, acrylic acid, an acrylic acid ester, methacrylic acid, a methacrylic acid ester, a vinyl ether, a vinyl ester, ethylene and propylene.
Claim 8
Dependent Claim
13 words
The method according to claim 1, wherein the substratum is concrete or mortar.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |