US3331200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for checking engine efficiency
Assignee: Individual
•
Filing: 1965-10-18
•
Granted: 1967-07-18
•
Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 Donald W Byron
- 👤 Jr J D Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
G; G01; G01M; G01M15/00; G01M15/04; G01M15/042; G01M15/044; G04; G04F; G04F8/00; G04F8/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
AN ENGINE PERFORMANCE INDICATOR COMPRISING A TACHOMETER HAVING AN INDICATING POINTER, A STOP WATCH HAVING A RESET BUTTON, SAID TACHOMETER HAVING CONTROL MEANS COMPRISING A LIGHT SOURCE AND PHOTOCELL MEANS ONE OF WHICH IS ADJUSTABLE ABOUT THE CIRCUMFERENCE OF THE FACE OF THE TACHOMETER AND THE OTHER IS CARRIED BY THE TACHOMETER SHAFT, THE SAID STOP WATCH HAVING A RESET BUTTON FOR STARTING AND STOPPING THE STOP WATCH, SOLENOID MEANS INCLUDING ACTUATING MEMBERS ARRANGED TO AUTOMATICALLY
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |