US3619913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demonstrator finger ring
Assignee: Individual
•
Filing: 1970-03-09
•
Granted: 1971-11-16
•
Expires: 1990-03-09
Abstract
Abstract A DEMONSTRATOR RING HAVING A PLURALITY OF CHANGEABLE PARTS COMPRISING A MALE ARCUATE PART, A FEMALE ARCUATE PART AND A TOP SETTING PART. THE TOP SETTING PART HAS A PLURALITY OF JOINING SEGMENTS PROJECTING FROM ITS BASE, THE MALE ARCUATE PART HAS A PLURALITY OF JOINING SEGMENTS PROJECTING FROM IT AND A PLURALITY OF CHANNEL-SHAPED RECESSES THEREIN, AND THE FEMALE ARCUATE PART AS A PLURALITY OF CHANNEL-SHAPED RECESSES THEREIN. THE PARTS ARE POSITIONED SO THAT THE JOINING SEGMENTS ENGAGE THE CHANNELSHAPED RECESSES TO FORM AN INTERCHANGEABLE FINER RING HAVING A SUBSTANTIALLY CIRCULAR INNER SURFACE.
Inventors
- 👤 Arthur B Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:06
CPC Classifications
A; A44; A44C; A44C9/00; A44C9/0038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |