US4174993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water proofing compositions for cement mortar or concrete and methods of application therefor
Assignee: Hayakawa Rubber Co Ltd
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Filing: 1978-07-27
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Granted: 1979-11-20
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Expires: 1998-07-27
Abstract
Abstract Water proofing compositions containing a Reclaimed butyl rubber of used inner tube scraps as the active component have a high adhesion to cement mortar or concrete and are used for water proofing materials in buildings and civil engineering works.
Inventors
- 👤 Toshihiro Fujii
- 👤 Sekiji Yokota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:05
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/60; C04B41/61; C04B41/62; C04B41/63; C04B41/45; C04B41/46; C04B41/48; C04B41/4857; C04B41/4861; C09; C09K; C09K3/00; C09K3/10; E; E02; E02B; E02B3/00; E02B3/16; C09K2003/1034; C09K2003/1081; C09K2200/00; C09K2200/02; C09K2200/0239; C09K2200/0243; C09K2200/0252; C09K2200/0278; C09K2200/0286; C09K2200/06; C09K2200/0607; C09K2200/061; C09K2200/0615; C09K2200/0617; C09K2200/064; C09K2200/0645; C09K2200/0647; C09K2200/0687; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T428/00; Y10T428/25; Y10T428/252; Y10T428/31504; Y10T428/31652; Y10T428/31667; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A method of water-proofing cement mortar and concrete comprising the steps of making a homogeneous mixture consisting essentially of 35-15% by weight of reclaimed butyl rubber, 40-50% by weight filler, 20-35% by weight of at least one of a thermoplastic synthetic resin and a low molecular weight isobutylene polymer and a softener; molding said mixture by extrusion into a desired shape; and placing said shape into engagement with said cement mortar or concrete.
Claim 2
Dependent Claim
22 words
A method as in claim 1, wherein said shape is placed into engagement with said cement mortar or concrete while still wet.
Claim 3
Dependent Claim
27 words
A method as in claim 1, wherein said shape is placed into engagement with said cement mortar or concrete after said cement mortar or concrete has hardened.
Claim 4
Dependent Claim
82 words
A water-proofing composition to be used in contact with wet cement mortar or wet concrete and having adhesion to the wet cement mortar or wet concrete without employing additional bonding materials and a consistency (JIS K2530 penetrometer) at 25° C. of 50-100, which consists essentially of 35-15% by weight of reclaimed butyl rubber, 40-50% by weight of a filler, 20-35% by weight of at least one of a thermoplastic synthetic resin and a low molecular weight of isobutylene polymer and a softener.
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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) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |