Pelofsky Arnold H: In situ production of bitumen from oil shale. Cities Service Research & Development Co, Ward Joshua J, Rushton George L, May 13, 1975: US3882941 (277 worldwide citation)

Hydrocarbons are recovered from oil shale deposits by introducing hot fluids into the deposits through wells and then shutting in the wells to allow kerogen in the deposits to be converted to bitumen which is then recovered through the wells after an extended period of soaking.

Hulka Jaroslav Fabian, Clemens George Selden: Surgical clip and applicator. Research Corporation, Stowell Harold L, May 13, 1975: US3882854 (267 worldwide citation)

A surgical clip, particularly adapted to produce necrosis in Fallopian tube tissue, consists of jaws hinged adjacent one end and a U-shaped spring which holds the jaws open in one position and exerts a closing pressure on the jaws in another position. The clip is particularly adapted to be applied t ...

Sinnreich Manfred: Surgical dilators having insufflating means. May 13, 1975: US3882852 (166 worldwide citation)

Surgical instrments for obstretical use including a first device for dilating the cervical neck, and a second defice for dilating the uterus. Each device includes a relatively rigid element surrounded by a pneumatically inflatable element, the rigid element projecting through the inflatable element ...

Lynn John R, Tate Jr George W: Automatic visual field examination including fixation monitoring compensation. Clegg Cantrell & Crisman, May 13, 1975: US3883235 (114 worldwide citation)

An illustrative embodiment of the present invention includes method and apparatus for determining locations in a test field at which a subject is able to perceive visual stimuli. The stimuli are presented on a test screen under control of a programmed automatic data processing system. The subject co ...

Jamshidi Khosrow: Soft Tissue Biopsy Device. May 13, 1975: US3882849 (106 worldwide citation)

A soft tissue biopsy aspirating device for gathering soft tissue samples comprising a syringe having a barrel, with a reciprocably movable plunger sealingly received within the barrel to form a chamber with a controllably variable volume, and with a hollow sample-receiving needle mounted on a needle ...

Taniguchi Takasi: Diaper set. May 13, 1975: US3882871 (103 worldwide citation)

A diaper set comprising in combination a water-repellent but gas-permeable, and stretchable diaper cover, a non-bulky and absorbent pad and a hydrophobic net fabric which is to be in direct contact with the infant body in use whereby the entire volume is smaller and has a higher gas-permeable and wa ...

Douvas Nicholas G, Dinkelkamp Henry T: Method and apparatus for cataract surgery. Harness Dickey & Pierce, May 13, 1975: US3882872 (99 worldwide citation)

A method for performing cataract surgery by slicing or shearing thin layers of cataractous tissue with a surgical probe incorporating a very small diameter tip which performs as a rotary cutter. In one embodiment of the invention, this tip includes a pair of concentric tubes, the outer of which is s ...

Sarnoff Stanley J, Calkins George B: Hypodermic injection device having cannula covered with resilient sheath. Survival Technology, Witherspoon and Lane, May 13, 1975: US3882863 (98 worldwide citation)

A hypodermic injection device comprising a cartridge holder having a cylindrical body open at one end and closed at the other end, the closed end being provided with an aperture, a cartridge including an ampoule with attached cannula within the holder, the cannula being directed toward the holder's ...

Kettering Donald E, Jones Morris E: Auxiliary control for a blood pump. Vital Assists, Workman H Ross, May 13, 1975: US3882861 (97 worldwide citation)

An auxiliary control for a blood pump used in hemodialysis which acts upon an existing blood pump controller to continuously vary the pump rate in direct correspondence with changes in flow of a patient's blood reflected as variations in negative pressure in a blood line. The auxiliary control regul ...

Hoskins Douglas Haig, Horne Thomas, Jarman Graham Roger, Dunsmore Arthur William: Automatic chemical analysis apparatus. Coulter Electronics, Silverman & Cass, May 13, 1975: US3883305 (97 worldwide citation)

An automatic chemical analysis apparatus having separate closed-looped conveyors for sample and reactant containers. At a fixed location, sample portions from a given sample are transferred to a serial sequence of reactant containers. Colourimetric testing is arranged such that all of the reactant p ...