James C Sternberg: Rate sensing batch analysis method. Beckman Instruments, R J Steinmeyer, R R Meads, January 20, 1976: US03933593 (178 worldwide citation)

A portable, automated chemical analyzer having a polarographic oxygen electrode submerged in a batch of stirred solution. The signal from the electrode is directly differentiated and amplified to produce a signal proportional to the time rate of change of oxygen concentration. The membrane of the po ...

Andrew Wayne Barnhart: Bilateral communications system for distributing commerical and premium video signaling on an accountable basis. Jerrold Electronics Corporation, John M Calimafde, January 20, 1976: US03934079 (144 worldwide citation)

A bilateral communications system, as for CATV application, distributes commercially available and premium video programming on a subscriber demand--directly accountable basis. At least the premium video programming is impressed on the cable in a frequency band and/or format not recoverable by a sta ...

Robert Matthews Murch: Fire-resistant intumescent laminates. W R Grace & Co, Giedre M McCandless, January 20, 1976: US03934066 (141 worldwide citation)

A fire-retardant, intumescent laminate system suitable for application to combustible or heat-sensitive substrates comprises an intumescent layer which is a porous sheet material, e.g., paper or foams saturated with an intumescent composition and having a flexible protective layer adhered to the int ...

Per Henrik Bjurwill, Nils Bertil Jacobson: Test and control device for electrosurgical apparatus. Aktiebolaget Stille Werner, Hill Gross Simpson Van Santen Steadman Chiara & Simpson, January 20, 1976: US03933157 (134 worldwide citation)

An electrosurgical apparatus having a diathermy current generator connected to an active electrode and a two-segment inactive electrode in surface engagement with the patient includes a test and control device automatically sensing the sum of the contact impedances of the two inactive electrode segm ...

Joseph Pasini III, William K Overbey Jr, Charles A Komar: Underground gasification of coal. The United States of America represented by the United States Energy Research and Development Administration, Dean E Carlson, Richard A Lambert, January 20, 1976: US03933447 (111 worldwide citation)

There is disclosed a method for the gasification of coal in situ which comprises drilling at least one well or borehole from the earth's surface so that the well or borehole enters the coalbed or seam horizontally and intersects the coalbed in a direction normal to its major natural fracture system, ...

Eugene L Helton, Walter B Miller: Multi-material ripper tip. Caterpillar Tractor Co, Phillips Moore Weissenberger Lempio & Strabala, January 20, 1976: US03932952 (109 worldwide citation)

A multi-material earthworking ripper tip having a leading nose portion comprised of a material having greater wear resistance and strength at elevated temperatures than the material which comprises the rearward shank supporting portion of the tip. In one embodiment, a bi-metallic nose portion is ine ...

Othar Meade Kiel: Hydraulic fracturing process using reverse flow. Murray Robinson, Ned L Conley, David Alan Rose, January 20, 1976: US03933205 (107 worldwide citation)

Well productivity is increased by multiple hydraulic fracturing cycles. A double cycle first creates a long primary fracture by fluid injection and forms spalls by subsequently allowing the pressure in the fracture to drop below the initial fracturing pressure by discontinuing injection and shutting ...

James S Adams, Leslie Dale Foster, William H Peck: Guard including electrical controls and slidable underneath the bed. Hill Rom Company, Robert V Jambor, January 20, 1976: US03932903 (104 worldwide citation)

Bed guard rotatable between elevated and lowered positions and slidable from the latter to a position underneath the bed. While elevated, it prevents accidental falling off, and when underneath, it allows facile patient management and movement of the bed through narrow passageways. Where the bed inc ...

Richard E Lyle, Edward G Foehr: Extended life functional fluid. Chevron Research Company, G F Magdeburger, C J Tonkin, L L Priest, January 20, 1976: US03933659 (103 worldwide citation)

Functional fluid lubricating oil compositions are provided which comprise (A) a major amount of an oil of lubricating viscosity, and (B) an effective amount of each of the following: (1) an alkenyl succinimide, (2) a Group II metal salt of a dihydrocarbyl dithiophosphoric acid, (3) a compound select ...

Guiseppe Bartolotta, Nicolaas Tieme DE Oude, Alfred Alexander Gunkel: Controlled sudsing detergent compositions. The Procter & Gamble Company, J J Yetter, C R Wilson, F L Collins, January 20, 1976: US03933672 (101 worldwide citation)

Detergent compositions having an effective suds controlling agent comprising a silicone material which is substantially removed from contact with the surfactant component of the composition.

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