Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 3951790 | Thiuram polysulfide heavy metal remover A polymeric compound having thiuram mono- or poly-sulfide linkage shows noteworthy property for removing and collecting heavy metals from the environment. Especially, said compound can remove mercury, in any form, from the environment effectively. On the ... | 04/20/1976 |
| 3948863 | Solid, water-insoluble polypeptides having ionizable side chains Solid bodies of polypeptides having repeating units of aspartic, glutamic, and aminoadipic esters are reacted with hydrazine or an amine having at least two NH2 groups until the ester moieties of the side chains are partly converted to the hydr... | 04/06/1976 |
| 3948791 | Ion exchanger and method for the production thereof An ion exchanger consisting of crushed lignite or brown coal retaining alkali ions, which is obtained by immersing the particles in a dilute caustic alkali solution. The concentration of the caustic alkali ranges from 2 to 20 weight percent, preferably fr... | 04/06/1976 |
| 3944415 | Removing heavy metal ions from water Heavy metal ions are removed from water by contact with formaldehyde-modified nut waste or tree bark.... | 03/16/1976 |
| 3936399 | Process of producing phenolic chelate resin using iminodiacetic acid A phenolic chelate resin having a high heavy-metal chelating ability and capable of being reused is produced by polycondensing a phenol containing an iminodiacetic acid group with an aldehyde.... | 02/03/1976 |
| 3935006 | Process for eluting adsorbed gold and/or silver values from activated carbon A process is disclosed which is directed to recovering gold and/or silver values from activated carbon, wherein gold and/or silver has been adsorbed thereon. The process comprises eluting the activated carbon with water soluble alcohols or ketones either ... | 01/27/1976 |
| 3935098 | Adsorbent process for heavy metals An adsorbent process for heavy metals or heavy metallic compounds, which comprises utilizing a resin prepared by a reaction between aldehydes, dithiocarbamate compounds and aromatic compounds having at least one radical selected from the group consisting ... | 01/27/1976 |
| 3932494 | Thiohumic acid, a process for preparing same, and its use for absorbing heavy metal ions The compound thiohumic acid resulting from replacing at least a part of the carboxyl groups in humic acid by thiocarboxyl groups, i.e., ##EQU1## as well as a heavy metal adsorbent containing thiohumic acid as its active ingredient. This new compound ... | 01/13/1976 |
| 3931123 | Hydrophilic nitrite copolymers A composition of matter with improved mechanical properties which contain 2 - 50 mol. percent of methacrylonitrile or acrylonitrile and 50 - 98 mol. percent of glycol monoesters of acrylic or methacrylic acid, where the glycol is selected from the group c... | 01/06/1976 |
| 3931002 | Process for removing heavy metals from solutions A process for removal of heavy metals from solutions or gaseous mixtures is disclosed, wherein the solutions or gaseous mixtures are contacted with a suitable sulphur-containing reagent consisting of: A. reduced keratin, B. Bunte salts of keratin, C. natural o... | 01/06/1976 |
