Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 5273827 | Composite article and method A composite article comprising a silicon body and a glass body bonded directly thereto by electrostatic bonding. The glass composition consists essentially of oxides of silicon, aluminum, and lithium, and the glass has a coefficient of thermal expansion a... | 12/28/1993 |
| 5254000 | Organic polymer lens mold A mold for an organic polymer, ophthalmic lens element has separate upper and lower mold members with each mold member being composed of a thermoplastic polymer. The lower mold member has a central, bowl-shaped cavity with contours that conform to those o... | 10/19/1993 |
| 5246890 | Non-lead sealing glasses Lead-free, SnO-ZnO-P2 O5 glasses contain 25-50 mole percent P2 O5 and SnO and ZnO in amounts such that the mole ratio of SnO:ZnO is in the range of 1:1 to 5:1. Optionally, the glasses may contain up to 20 mole p... | 09/21/1993 |
| 5244845 | Multipurpose photochromic brown glasses A composition for a photochromic glass consisting essentially of, in approximate calculated weight percent, about: ______________________________________ SiO2 54-58% Ag 0.18-0.33% B2 O3 ... | 09/14/1993 |
| 5232637 | Ophthalmic lens method A method of producing a glass-plastic, laminated, ophthalmic lens structure in a continuous operation. A thin, flexible, plastic adhesive layer is applied to a glass element to form a composite body that is inserted in a cylindrical gasket in such manner ... | 08/03/1993 |
| 5228243 | Support for a mirror blank A support for a glass blank, e.g. a telescope mirror blank, while a surface of the blank is being ground. The support comprises a blocking body and a plurality of spaced, flexible tubes extending in a parallel pattern over the blocking body surface. At le... | 07/20/1993 |
| 4488864 | Integral optical device and method of making it There is disclosed an improved integral optical device of the type produced by creating optical patterns in porous glass bodies, especially patterns involving gradient refractive index distributions. The optical strength of an element, such as a lens, in ... | 12/18/1984 |
| 4405672 | Composite photochromic glass article and method of making There is disclosed a composite photochromic glass article composed of a glass core and a thin surface layer substantially encasing that core, the core preferably containing a copper-cadmium halide photochromic crystal system and the substantially encasing... | 09/20/1983 |
