1
Greenleaf James O: Roofing tile. Stepan Chemical Company, May 25, 1971: US3579940 (55 worldwide citation)

Plastic molded roofing tile arranged so that laterally positioned tiles overlap in a ridge and channel arrangement. An upstanding flange at the top end of this overlap dams water flow against movement in that direction. Longitudinally related tiles are also overlapped with an upstanding flange at th ...


2
Kang Hyung H, Peters Rodger G, Knaggs Edward A: Domestic laundry fabric softener. Stepan Chemical Company, Hill Gross Simpson Van Santen Steadman Chiara & Simpson, October 28, 1975: US3915867 (52 worldwide citation)

A self-emulsifying domestic laundry fabric active softener base comprised of N-methyl, N,N-di-(.beta.-C.sub.14 - C.sub.18 -acyloxy ethyl), N-.beta.-hydroxy ethyl ammonium metho sulfate characterized by good softening, outstanding whiteness-retention and excellent rewetting properties and has a light ...


3
Marvin L Nussbaum, Edward A Knaggs: Process for sulfonation. Stepan Chemical Company, Hill Gross Simpson Van Santen Steadman Chiara & Simpson, April 10, 1979: US04148821 (47 worldwide citation)

A technique for sulfonating petroleum oil feed stocks which materially increases the extent of reaction between the sulfonatable components present in the feed stock and sulfur trioxide, and yields an improved sulfonated product. The invention provides a method which includes forming a liquid mixtur ...


4
Joseph R Wechsler, Mark Lane: Alkoxylated quaternary ammonium surfactants. Stepan Chemical Company, Hill Van Santen Steadman Chiara & Simpson, January 25, 1983: US04370272 (30 worldwide citation)

Esters of alkoxylated long chain fatty alchols with halo acetic acid are contacted with tertiary amines incorporating a long chain aliphatic group to produce a class of novel quaternary ammonium compounds. These product compounds have utility as fabric softeners and as hair conditioners.


5
Marvin L Nussbaum, Edward A Knaggs: Sulfonation petroleum composition. Stepan Chemical Company, Hill Van Santen Steadman Chiara & Simpson, June 28, 1983: US04390474 (29 worldwide citation)

A technique for sulfonating petroleum oil feed stocks which materially increases the extent of reaction between the sulfonatable components present in the feed stock and sulfur trioxide, and yields an improved sulfonated product. The invention provides a method which includes forming a liquid mixtur ...


6
Beck Walter, Blackwood John C: Metallic salts of tetrazoles used as blowing and intumescent agents for thermoplastic polymers. Stepan Chemical Company, Crowley Richard P, March 25, 1975: US3873477 (28 worldwide citation)

Tetrazole metal salts of zinc, barium, calcium, lead and aluminum are useful as blowing agents in high-temperature processing polymers, such as polycarbonate and polysulfone resins.


7
Julius H Deutsch: Emulsion polymerization with sulfonated alkoxylated alkyl arylol maleates. Stepan Chemical Company, Hill Van Santen Steadman Chiara & Simpson, January 20, 1981: US04246387 (27 worldwide citation)

Emulsion polymerization is carried out with reactive surfactants comprised of ring sulfonated maleate half esters of alkoxylated alkyl arylols.


8
John C Blackwood: Metal fastener sticks and process of preparing same by curing polymeric binder for said under conditions of U.V. irradiation. Stepan Chemical Company, Richard P Crowley, April 19, 1977: US04018333 (21 worldwide citation)

Metal fastener sticks wherein the individual fastening elements, such as staples, on the stick are secured together by a radiation cross-linked polymer, and which metal fastener stick is prepared by: coating the metal fastener stick with a solventless, radiation -curable, polymeric composition, such ...


9
Jacobs Richard L, Backley Donald A, Simpson James V, Beck Walter: Low-density polyester resin foams and method of preparation. Stepan Chemical Company, Crowley Richard P, November 18, 1975: US3920591 (20 worldwide citation)

Low-density polyester foams are prepared from an admixture which comprises in combination a liquid unsaturated curable polyester resin, a peroxide curing agent, an accelerator, a hydrazide blowing agent and an aliphatic amine which controls the rate of polymerization of the resin, so as to permit ex ...


10
Jacobs Richard L, Backley Donald A, Simpson James V, Beck Walter: Low-density polyester resin foams and method of preparation. Stepan Chemical Company, Crowley Richard P, November 18, 1975: US3920590 (19 worldwide citation)

Low-density polyester foams are prepared from an admixture which comprises in combination a liquid unsaturated curable polyester resin, a peroxide-curing agent, a cobalt promoter and a hydrazide blowing agent, the peroxide-curing agent and cobalt promoter both present in high concentration levels.