US3609960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: ALDUC
•
Filing: 1969-11-28
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Granted: 1971-10-05
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Expires: 1989-11-28
Abstract
Abstract A TIMEPIECE DIAL OF TRANSLUCENT MATERIAL HAS A LIGHT SOURCE SUCH AS AN INCANDESCENT ELECTRIC LIGHT IN THE MATERIAL OF THE DIAL WHICH ILLUMINATED TO SHOW THE HOUR MARKERS IN RELIEF. THE DIAL PREFERABLY HAS INTERNAL RE- FRACTING SURFACES TO REFRACT LIGHT THROUGH THE PART BEARING THE HOUR MARKERS.
Inventors
- 👤 Charles Huther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:37
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/30
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |