|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||62/514R ; 62/49 ; 62/55|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 10 인용 특허 : 2|
A cooling apparatus utilizing liquid nitrogen for cooling specimens to temperatures in the range from -100°C. to -195°C. in propane, halogenated hydrocarbons, isopentane, or other cooling media. Freezing of the cooling media is avoided by means of an arrangement wherein the liquid nitrogen cools the cooling-bath container and/or the liquifier only initially, but after the desired cooling-bath temperature has been reached, the liquid nitrogen level is lowered to below the height of a protective shell which results in further cooling being only indirect, v...
Liquid cooling apparature having an intermediate vessel capable of transferring heat at two different rates which comprises, a first vessel having an upper rim and being adapted to receive a liquid cryogen, a second vessel having an upper rim supported in said first vessel, the upper rim of said second vessel being located below the upper rim of said first vessel, said second vessel further being adapted to receive liquid cryogen from said first vessel, when the liquid cryogen level is higher than the upper rim of said second vessel, and a third vessel h...