|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||E04G-021/14 B29C-039/42 E03B-007/09 E02D-029/12 B28B-007/16 B29C-067/24 E03F-005/02 F16L-001/038|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 3 인용 특허 : 85|
Resin-based structures for use in corrosive environments. The resin-based structures may include a mixture of resin and aggregate. The resin-based structures may be formed in a mold by placing aggregate and resin into the mold. The resin-based structures may have thin wall design with high compression and tension strength.
1. A manhole apparatus having a wastewater inlet and a wastewater outlet configured and adapted to be connected to a municipal wastewater system, the manhole apparatus comprising: a base portion having an upper surface that includes a fluid trough extending between the wastewater inlet and the wastewater outlet;a top portion defining a worker access opening; anda riser portion interposed between the base portion and the top portion, the riser portion having a sidewall that defines a circular passageway having an inner diameter;wherein a thickness of the ...