US3615162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound intensity indicator system
Assignee: Individual
•
Filing: 1969-04-11
•
Granted: 1971-10-26
•
Expires: 1989-04-11
Abstract
Abstract DISCRETE SOUND LEVELS ARE INDICATED BY A SERIES OF LAMPS. EACH LAMP INDICATES A SOUND INTENSITY WITHIN A PREDETERMINED RANGE. LAMP COLORS ARE CHOSEN TO SIGNIFY INTENSITY CLASSIFICATIONS.
Inventors
- 👤 Alfred W Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:35
CPC Classifications
G; G01; G01H; G01H3/00
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |