Ring
US6260383A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Jun 28, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA44C9/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An integral ring which is contains at least 35 weight percent of a precious metal selected from the group consisting of silver and gold and has a porosity of less than 0.1 percent, a Vickers pyramidal hardness of at least about 120, and a tensile strength at least about 60,000 pounds per square inch. The ring has an inner diameter of from about 0.55 to about 0.93 inches, and outer diameter of from about 0.61 to about 1.09 inches, a thickness of from about 0.03 to about 0.08 inches, and a circumference of from about 1.7 to about 3.5 inches. Disposed about and extending around the entire outer surface of the ring is a first annular groove and a second, spaced apart annular groove, and at least 10 adjoining recessed areas are disposed between and communicate with these annular grooves. Each of the first annular groove and the second annular groove has a width of from about 0.01 to about 0.02 inches and a depth of from about 0.008 to about 0.018 inches. Disposed between the adjoining recessed areas are at least about 10 raised indicia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.