US3091688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Validity detector
Assignee: Westinghouse Air Brake Co
•
Filing: 1959-04-27
•
Granted: 1963-05-28
•
Expires: 1979-04-27
Abstract
No abstract record available.
Inventors
- 👤 Jr James A Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:40
CPC Classifications
B; B61; B61L; B61L17/00; B61L17/02; B61L17/023
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
APPARATUS FOR EVALUATING ROLLING RESISTANCE MEASUREMENTS MADE ON RAILWAY CARS MOVING IN A STRETCH OF TRACK, COMPRISING, IN COMBINATIOIN, MEANS FOR GENERATING A SIGNAL IN ACCORDANCE WITH THE ROLLING RESISTANCE OF A CAR MOVING IN SAID STRETCH, STORAGE MEANS FOR STORING IN APPLIED SIGNAL WHEN ACTUATED, MEANS FOR APPLYING SAID SIGNAL TO SAID STORAGE MEANS, MEANS CONTROLLED BY SAID SIGNAL FOR ACTUATING SAID STORAGE MEANS WHEN SAID SIGNAL IS WITHIN PRESCRIBED LIMITS, AND MERANS FOR DELAYING THE ACTUATION OF
References Cited (Backward Citations)
US2915623A
Cited
US2721258A
Cited
US2846522A
Cited
US2839681A
Cited
US2891144A
Cited
US2817076A
Cited
US2971084A
Cited
US2901609A
Cited
US2965889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |