Patents Assigned to Dynapol
  • Patent number: 4532128
    Abstract: Polymeric quaternary ammonium compounds having recurring vinylbenzyl ammonium units are disclosed. The quaternary ammonium units preferably have 2 alkyl substituents of 1 to 4 carbons and 1 alkyl substituent of 4 to 12 carbons. These materials have antimicrobial properties and are particularly useful for preserving ophthalmic solutions.
    Type: Grant
    Filed: September 17, 1984
    Date of Patent: July 30, 1985
    Assignee: Dynapol
    Inventors: Bernard G. Sheldon, Robert E. Wingard, Jr., Ned M. Weinshenker, Daniel J. Dawson
  • Patent number: 4526933
    Abstract: Polymer compounds which have recurring ##STR1## units are disclosed. These polymers provide active methylene groups which serve as points of attachment for organic groups--particularly azo functionality-containing groups. These azo links can be cleaved by bacteria in the mammalian lower bowel, thereby releasing the corresponding amino groups. This mechanism can effect programmed delivery of pharmaceutically desirable species to the lower bowel.
    Type: Grant
    Filed: February 17, 1984
    Date of Patent: July 2, 1985
    Assignee: Dynapol
    Inventors: Patricia C. Wang, Daniel J. Dawson
  • Patent number: 4490557
    Abstract: Ethylidene bisformamide is prepared by reacting, at elevated temperatures, dry acetaldehyde and formamide in the presence of an acidic catalyst and an ammonia scavenger such as acetic anhydride. The bisformamide is recovered as a bottoms products of high speed low residence time distillation techniques, e.g., wiped film evaporation. The resulting ethylidene bisformamide may be cracked to N-vinylformamide, which monomer is useful in the preparation of active polymers and copolymers, including poly(vinylformamide) which can be hydrolyzed to poly(vinylamine) salts by contact with acid. These amine salts can then be converted to the free amines, which are precursors of polymeric dyes and pharmaceuticals.
    Type: Grant
    Filed: November 5, 1981
    Date of Patent: December 25, 1984
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Kenneth M. Otteson
  • Patent number: 4489197
    Abstract: Polymeric compounds which have recurring ##STR1## units, wherein X is N or O, R.sub.1, R.sub.2 and R.sub.3 are hydrogens or lower alkyls and R.sub.4 is ##STR2## and aromatic amine or an aromatic hydrazine which provides X as N. These polymers provide active methylene groups which serve as points of attachment for organic groups-particularly azo functionality-containing groups. These azo links can be cleaved by bacteria in the mammalian lower bowel, thereby releasing the corresponding amino groups. This mechanism can effect programmed delivery of pharmaceutically desirable species to the lower bowel.
    Type: Grant
    Filed: February 17, 1984
    Date of Patent: December 18, 1984
    Assignee: Dynapol
    Inventors: Patricia C. Wang, Daniel J. Dawson
  • Patent number: 4482680
    Abstract: Polymeric quaternary ammonium compounds having recurring vinylbenzyl ammonium units are disclosed. The quaternary ammonium units preferably have 2 alkyl substituents of 1 to 4 carbons and 1 alkyl substituent of 4 to 12 carbons. These materials have antimicrobial properties and are particularly useful for preserving ophthalmic solutions.
    Type: Grant
    Filed: April 13, 1983
    Date of Patent: November 13, 1984
    Assignee: Dynapol
    Inventors: Bernard G. Sheldon, Robert E. Wingard, Jr., Ned M. Weinshenker, Daniel J. Dawson
  • Patent number: 4454290
    Abstract: Analogs of the glycoside stevioside are disclosed. These materials have the formula ##STR1## wherein R is a simple physiologically acceptable noncarbohydrate polar organic group. The analogs are sweet and find use as sweeteners.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: June 12, 1984
    Assignee: Dynapol
    Inventor: Grant E. DuBois
  • Patent number: 4404367
    Abstract: Glucosubstituented diterpenoid compounds analogous to stevioside, rebaudosides C and A, steviolmonoside and steviolbioside but having their gluco units substituted with simple monoglycosidic polar groups and optionally having their C.sub.19 carboxyls as simple esters are disclosed. These materials are sweet and do not degrade under mammalian GI tract conditions.
    Type: Grant
    Filed: August 26, 1981
    Date of Patent: September 13, 1983
    Assignee: Dynapol
    Inventors: Rebecca A. G. Stephenson, Paul S. Dietrich, Grant E. DuBois, Leonard A. Bunes
  • Patent number: 4402990
    Abstract: Analogs of the glycoside stevioside are disclosed. These materials have the formula ##STR1## wherein R is a simple physiologically acceptable noncarbohydrate polar organic group. The analogs are sweet and find use as sweeteners.
    Type: Grant
    Filed: August 26, 1981
    Date of Patent: September 6, 1983
    Assignee: Dynapol
    Inventor: Grant E. DuBois
  • Patent number: 4403072
    Abstract: 2-Alkoxyethanols, particularly 2-methoxyethanol and 2-ethoxyethanol, aqueous solvents based thereon are disclosed as advantageous solvents for the liquid phase coupling of sulfaryl halides to polymeric amines.
    Type: Grant
    Filed: September 9, 1981
    Date of Patent: September 6, 1983
    Assignee: Dynapol
    Inventor: Leonard A. Bunes
  • Patent number: 4401516
    Abstract: Acetamidoethylene is isolated from acetamidoethylene-containing mixtures by distillation with enhanced efficiency when a high-boiling liquid, especially glycerol, is added to the mixtures prior to or during said distillation. This invention is particularly effective at separating acetamidoethylene from mixtures additionally containing acetamide, especially preparation products.
    Type: Grant
    Filed: November 24, 1981
    Date of Patent: August 30, 1983
    Assignee: Dynapol Shareholders Liquidating Trust
    Inventor: David P. Matzinger
  • Patent number: 4397997
    Abstract: Polymeric diazonium salts are coupled to coupling agents without complications of precipitation by injecting a diazonium salt solution into a substantial volume excess of the coupling agent solution immediately adjacent to the impellor of a centrifugal pump or the like.
    Type: Grant
    Filed: November 4, 1981
    Date of Patent: August 9, 1983
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Phillip J. Brock
  • Patent number: 4393175
    Abstract: An improvement in the diazotization of polymeric amines is disclosed that minimizes crosslinking problems. Solutions of nitrite ion and polymeric amine are concurrently continuously fed at controlled rates to a turbulently agitated limited volume mixing zone.
    Type: Grant
    Filed: September 9, 1981
    Date of Patent: July 12, 1983
    Assignee: Dynapol
    Inventors: Phillip J. Brock, Daniel J. Dawson
  • Patent number: 4393174
    Abstract: Pendant amide polymers, especially polymers containing N-vinylacetamide, N-alkyl-N-vinylacetamide, or N-vinyl-formamide units, are hydrolyzed to pendant amine polymers, especially vinylamine polymers by contact with strong aqueous base at elevated temperature.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: July 12, 1983
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Phillip J. Brock
  • Patent number: 4386206
    Abstract: Anthrapyridones are prepared in high yields from 1-aminoanthraquinones or 1-alkylaminoanthraquinones and phenylacetyl halides when tertiary amides are employed as reaction media. The phenylacetyl halides can be generated in situ from phenylacetic acid and thionyl halide or phosgene.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: May 31, 1983
    Assignee: Dynapol
    Inventors: Robert E. Wingard, Jr., Sally A. Swanson
  • Patent number: 4382800
    Abstract: Soluble polymeric colorants composed of free amine groups and chromophoric groups covalently bonded to an organic backbone are disclosed. The number of free amine groups is not less than one-half the number of chromophoric groups. The colorants are characterized by being free of sulfonate, phosphonate and carboxylate groups. The preparation and use of these colorants is also disclosed.
    Type: Grant
    Filed: September 28, 1981
    Date of Patent: May 10, 1983
    Assignee: Dynapol
    Inventors: Patricia C. Wang, Robert E. Wingard, Jr.
  • Patent number: 4381185
    Abstract: Water-fast printing of paper stock using a colorant solution containing water-soluble polymeric dyes is accomplished by a three step process. Step 1 is selecting a paper stock characterized as containing at least 250 ppm by weight of cation, particularly a polyvalent metal cation (especially Ca.sup.2+ or Al.sup.3+). In step 2, a colorant solution is applied to the paper. This solution is water-based, containing up to 30 wt % of an organic paper-penetrating agent (such as an alkanol), and at least 500 ppm of one or more anionic group-possessing polymeric colorants. In step 3, the solvent is exhausted by either evaporation (which may be aided by the application of heat) or diffusion into the paper stock, or by a combination of both.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: April 26, 1983
    Assignee: Dynapol
    Inventors: Sally A. Swanson, Ned M. Weinshenker, Robert E. Wingard, Jr., Daniel J. Dawson
  • Patent number: 4381402
    Abstract: Analogs of the glycoside stevioside are disclosed. These materials have the formula ##STR1## wherein R.sub.1 and R.sub.2 are as follows:______________________________________ R.sub.1 R.sub.2 ______________________________________ (CH.sub.2).sub.3 SO.sub.3.sup.- M.sup.+ .beta.-D-Sophorose (CH.sub.2).sub.3 SO.sub.3.sup.- M.sup.+ (CH.sub.2).sub.3 SO.sub.3.sup.- M.sup.+ H (CH.sub.2).sub.3 SO.sub.3.sup.- M.sup.+ ______________________________________and M.sup.+ is a physiologically acceptable alkali metal cation.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: April 26, 1983
    Assignee: Dynapol
    Inventor: Grant E. DuBois
  • Patent number: 4375357
    Abstract: A family of polymeric black colorants is disclosed. The subject colorants are composed of an organic polymer backbone comprised of a plurality of aromatic rings from which depend via azo groups a plurality of chromophore units having the structure ##STR1## wherein M is hydrogen or preferably a cation. These polymeric colorants are water-soluble, and noncrystalline and form dyes and inks that are fast to paper stock.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: March 1, 1983
    Assignee: Dynapol
    Inventors: Robert E. Wingard, Jr., Steve Y. W. Ng, Sally A. Swanson
  • Patent number: 4353889
    Abstract: Analogs of the glycoside rebaudioside A are disclosed. These materials have the formula ##STR1## wherein R is a simple physiologically acceptable noncarbohydrate polar organic group. The analogs are sweet and find use as sweeteners.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: October 12, 1982
    Assignee: Dynapol
    Inventor: Grant E. DuBois
  • Patent number: 4339237
    Abstract: Soluble polymeric colorants composed of free amine groups and chromophoric groups covalently bonded to an organic backbone are disclosed. The number of free amine groups is not less than one-half the number of chromophoric groups. The colorants are characterized by being free of sulfonate, phosphonate and carboxylate groups. The preparation and use of these colorants is also disclosed.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: July 13, 1982
    Assignee: Dynapol
    Inventors: Patricia C. Wang, Robert E. Wingard, Jr.