Patent US3144837A successfully refreshed from Google Patents.
US3144837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work apparatus for use on railroads and the like
Assignee: Individual
•
Filing: 1961-03-21
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Granted: 1964-08-18
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Expires: 1981-03-21
Abstract
No abstract record available.
Inventors
- 👤 Roy C Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:12
CPC Classifications
E; E01; E01B; E01B31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
WORK APPARATUS FOR USE ON RAILROADS AND THE LIKE COMPRISING A WHEELED PARENT CARRIAGE UNIT POSITIONED UPON A RAILROAD TRACK, A PAIR OF AUXILIARY WORK UNITS POSITIONED UPON THE TRACK IN SPACED RELATION TO SAID PARENT CARRIAGE UNIT, MOTOR MEANS ON SAID PARENT CARRIAGE UNIT EFFECTIVE UPON ACTIVATION TO PROPEL SAID PARENT CARRIAGE UNIT ALONG THE TRACK, CONTROL DEVICES AT SAID AUXILIARY WORK UNITS MOVABLE BETWEEN FIRST AND SECOND POSITIONS, SAID CONTROL DEVICES BEING OPERATIVELY CONNECTED TO SAID MOTOR MEANS FOR DE-ACTIVATING AND ACTIVATING THE SAME, SAID MOTOR MEANS BEING DE-ACTIVATED BY LOCATION OF EITHER OF SAID CONTROL DEVICES IN SAID FIRST POSITION THEREOF, AND CARRIAGE UNIT BY LOCATION OF SAID CONTROL DEVICES AT BOTH OF SAID AUXILIARY WORK UNITS IN SAID SECOND POSITIONS THEREOF.
Claim 2
Dependent Claim
125 words
WORK APPARATUS FOR USE ON RAILROADS AND THE LIKE COMPRISING A WHEELED PARENT CARRIAGE UNIT POSITIONED UPON A RAILROAD TRACK, A PAIR OF AUXILIARY WORK UNITS POSITIONED UPON THE TRACK IN SPACED RELATION TO SAID PARENT CARRIAGE UNIT, MOTOR MEANS ON SAID PARENT CARRIAGE UNIT EFFECTIVE UPON ACTIVATION TO PROPEL SAID PARENT CARRIAGE UNIT ALONG THE TRACK, CONTROL DEVICES AT SAID AUXILIARY WORK UNITS MOVABLE BETWEEN FIRST AND SECOND POSITIONS, SAID CONTROL DEVICES BEING OPERATIVELY CONNECTED TO SAID MOTOR MEANS FOR DE-ACTIVATING AND ACTIVATING THE SAME, SAID MOTOR MEANS BEING DE-ACTIVATED BY LOCATION OF EITHER OF SAID CONTROL DEVICES IN SAID FIRST POSITION THEREOF, AND CARRIAGE UNIT BY LOCATION OF SAID CONTROL DEVICES AT BOTH OF SAID AUXILIARY WORK UNITS IN SAID SECOND POSITIONS THEREOF.
References Cited (Backward Citations)
US2028768A
Cited
GB497654A
Cited
US2676549A
Cited
US2976816A
Cited
US2999467A
Cited
AT204588B
Cited
US3000099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |