"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 3991109 | Diacyl peroxy compounds I. A novel class of compounds Xn --Rp --Ym where R is a 2-4 valence aliphatic, cycloaliphatic or aromatic radical, X is an acylating function; Y is a peroxy containing group and n and m are each equal to 1-2 and p is at le... | 11/09/1976 |
| 3985690 | Enzyme separation A reactive matrix comprises a co-enzyme chemically attached to a water insoluble organic polymeric support material. The reactive matrix may be used in a process for the separation of mixtures containing a plurality of enzymes.... | 10/12/1976 |
| 3967922 | Granular dyestuff preparations based on polyvinylalcohol as the carrier Pulverulent or granular dyestuff preparations containing water-soluble dyestuffs and polyvinyl alcohol are suitable for the preparation of concentrated dyestuff solutions in water, water-soluble organic solvents or in mixtures thereof.... | 07/06/1976 |
| 3959242 | Silane grafted poly(vinyl alcohol) film A thermoplastic composition suitable as a mold release surface for preparing cast articles which comprises a silane grafted poly(vinyl alcohol) prepared by the method which comprises incrementally reacting a selected silane with the poly(vinyl alcohol) ch... | 05/25/1976 |
| 3948866 | Polymerization with the aid of macromolecule having both a monomer soluble portion and suspension soluble portion A process for the suspension polymerization of ethylenically unsaturated monomers -- particularly for the preparation of water-soluble polymers -- wherein a liquid monomer phase is polymerized while suspended in a liquid organic suspending medium in the p... | 04/06/1976 |
| 3943150 | Salt of b-diethylaminoethyl ester of p-aminobenzoic acid with acetal of polyvinyl alcohol and glyoxalic and method of preparing same A salt of ଲ-diethylaminoethyl ester of p-aminobenzoic acid with the acetal of polyvinyl alcohol and glyoxalic acid which has the formula: ##EQU1## wherein n is a degree of polymerization within the range of from 100 to 1,200; x is a degree of s... | 03/09/1976 |
| 3941750 | Polyvinylpyrenal--an intrinsic photoconductor and active matrix polymer A polyvinylpyrenal copolymer obtained by condensing the corresponding aromatic aldehyde with a copolymer of vinyl alcohol and having a number average molecular weight of at least 5,000. Also included are photoconductive members utilizing such material as ... | 03/02/1976 |
| 3934587 | Disposable articles having a water-permeable and water-repellent surface A novel material is disclosed and a process and apparatus for making the same, which process comprises reacting one side of a solid sheet or film of a polymeric compound containing reactable hydroxyl or amine groups with a vapor phase mixture of acid chlo... | 01/27/1976 |
| 3933746 | Photopolymerizable polymers having anhydride-containing groups The polymer herein described comprises an anhydride-containing group represented by the structure: ##EQU1## wherein R is a residue of a dibasic acid selected from the group consisting of aliphatic dicarboxylic acids and aromatic dicarboxylic aci... | 01/20/1976 |
| 3932564 | Electroconductive resins and process of preparation Electroconductive cationic resins prepared by the reaction of a 1,4-dihaloalkene-2 compound and a di(tertiary amine). The resins are quaternary ammonium compounds. They may be prepared in aqueous medium. They may be blended with polyvinyl alcohol and the ... | 01/13/1976 |