Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 3959441 | Desulfurization process Sulphur dioxide is removed from a stack gas by bringing said gas containing SO2 into contact with an absorbing solution prepared by adding an hydroxide of a metal from either Groups II, III and VIII of the periodic Table to an aqueous solution ... | 05/25/1976 |
| 3954453 | Recovery of copper from ammoniacal copper sulfate solution Metallic copper is recovered from an ammoniacal copper sulfate solution by treating such solution with sulfur dioxide to form a precipitate of copper ammonium sulfite. The crystals are suspended in an acidic solution containing initially from 20 to 75 gra... | 05/04/1976 |
| 3937682 | Stress-sensitive composition A composition for forming into a soft, pliable, leather-like material includes a polyolefine having from 50 to 90 weight percent of inorganic compounds. The inorganic compounds contain a substantial amount of calcium sulfite having crystal sizes of 1-100 ... | 02/10/1976 |
| 3933602 | Palladium electroplating bath, process, and preparation Disclosed is an aqueous plating bath suitable for obtaining electrodeposits of palladium and its alloys. The bath is substantially free of cyanide, nitrate and nitrite, and comprises sulfite ion, palladium in the form of a tetra-coordinated complex with p... | 01/20/1976 |
