Patent US3204233A successfully refreshed from Google Patents.
US3204233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slope indicator
Assignee: Individual
•
Filing: 1961-10-18
•
Granted: 1965-08-31
•
Expires: 1981-10-18
Abstract
No abstract record available.
Inventors
- 👤 William F Olliff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:06
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A SLOPE INDICATOR COMPRISING A BOX-LIKE CASING, A BATTERY WITHIN SAID CASING, AN ON-OFF SWITCH MOUNTED ON SAID CASING, A CIRCUIT FOR SAID BATTERY AND CONNECTED TO SAID ON-OFF SWITCH, A MERCURY SWITCH CARRYING ARM PIVOTALLY MOUNTED ON SAID CASING, A MERCURY SWITCH MOUNTED TRANSVERSELY ON THE CENTRAL PORTION OF SAID CARRYING ARM, SAID MERCURY SWITCH INCLUDING A U-SHAPED TUBULAR MEMBER FORMED OF CONDUCTING MATERIAL, MERCURY WITHIN SAID U-SHAPED TUBULAR MEMBER, PLUGS CLOSING THE ENDS OF SAID TUBULAR MEMBER, A PAIR OF ELECTRODES RESPECTIVELY CARRIED BY SAID PLUGS AND INSULATED FROM SAID TUBULAR MEMBER, SAID TUBULAR MEMBER BEING CONNECTED IN SERIES WITH SAID SWITCH AND SAID BATTERY IN SAID CIRCUIT, A PAIR OF LIGHTS ELECTRICALLY CONNECTED RESPECTIVELY TO SAID ELECTRODES AND TO SAID BATTERY, A PLATE REMOVABLY CARRIED BY SAID CASING, AN ARM PIVOTALLY MOUNTED ON THE CENTRAL PORTION OF SAID PLATE, SAID ARM SELECTIVELY PROTRUDING BEYOND THE ENDS OF SAID PLATE, AND LIGHT MOUNTING BRACKETS AT THE END OF SAID ARM, SAID LIGHTS BEING RESPECTIVELY CARRIED BY SAID MOUNTING BRACKETS.
Claim 2
Dependent Claim
171 words
A SLOPE INDICATOR COMPRISING A BOX-LIKE CASING, A BATTERY WITHIN SAID CASING, AN ON-OFF SWITCH MOUNTED ON SAID CASING, A CIRCUIT FOR SAID BATTERY AND CONNECTED TO SAID ON-OFF SWITCH, A MERCURY SWITCH CARRYING ARM PIVOTALLY MOUNTED ON SAID CASING, A MERCURY SWITCH MOUNTED TRANSVERSELY ON THE CENTRAL PORTION OF SAID CARRYING ARM, SAID MERCURY SWITCH INCLUDING A U-SHAPED TUBULAR MEMBER FORMED OF CONDUCTING MATERIAL, MERCURY WITHIN SAID U-SHAPED TUBULAR MEMBER, PLUGS CLOSING THE ENDS OF SAID TUBULAR MEMBER, A PAIR OF ELECTRODES RESPECTIVELY CARRIED BY SAID PLUGS AND INSULATED FROM SAID TUBULAR MEMBER, SAID TUBULAR MEMBER BEING CONNECTED IN SERIES WITH SAID SWITCH AND SAID BATTERY IN SAID CIRCUIT, A PAIR OF LIGHTS ELECTRICALLY CONNECTED RESPECTIVELY TO SAID ELECTRODES AND TO SAID BATTERY, A PLATE REMOVABLY CARRIED BY SAID CASING, AN ARM PIVOTALLY MOUNTED ON THE CENTRAL PORTION OF SAID PLATE, SAID ARM SELECTIVELY PROTRUDING BEYOND THE ENDS OF SAID PLATE, AND LIGHT MOUNTING BRACKETS AT THE END OF SAID ARM, SAID LIGHTS BEING RESPECTIVELY CARRIED BY SAID MOUNTING BRACKETS.
References Cited (Backward Citations)
US2306877A
Cited
US1142134A
Cited
DE352070C
Cited
US1375278A
Cited
FR643079A
Cited
US2122921A
Cited
US2100105A
Cited
US2338811A
Cited
US2383889A
Cited
US2547199A
Cited
US2831183A
Cited
US2986616A
Cited
US2950365A
Cited
US3084233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |