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US3234378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad car retarder system
Assignee: Individual
•
Filing: 1961-02-13
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Granted: 1966-02-08
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Barnard G Gallacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:08
CPC Classifications
B; B61; B61K; B61K7/00; B61K7/02; B61K7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A CAR RETARDER SYSTEM COMPRISING: A TRACK HAVING A CREST, A TRACK SECTION EXTENDING FROM SAID CREST TO THEREBY DEFINE A DIRECTION, SAID SECTION HAVING A NEGATIVE GRADE IN SAID DIRECTION; NORMALLY CLOSED BRAKING MEANS LOCATED ADJACENT SAID SECTION FOR BRAKING A CAR TO A STANDSTILL AT A POINT WITHIN SAID BRAKING MEANS; MEANS CONNECTED WITH SAID BRAKING MEANS FOR OPENING SAID BRAKING MEANS AFTER SAID CAR HAS BEEN BROUGHT TO A STANDSTILL WITHIN SAID BRAKING MEANS; AND MEANS FOR THEN MAINTAINING SAID BRAKE IN ITS OPEN POSITION UNTIL SAID CAR HAS CLEARED SAID BRAKING MEANS.
Claim 2
Dependent Claim
96 words
A CAR RETARDER SYSTEM COMPRISING: A TRACK HAVING A CREST, A TRACK SECTION EXTENDING FROM SAID CREST TO THEREBY DEFINE A DIRECTION, SAID SECTION HAVING A NEGATIVE GRADE IN SAID DIRECTION; NORMALLY CLOSED BRAKING MEANS LOCATED ADJACENT SAID SECTION FOR BRAKING A CAR TO A STANDSTILL AT A POINT WITHIN SAID BRAKING MEANS; MEANS CONNECTED WITH SAID BRAKING MEANS FOR OPENING SAID BRAKING MEANS AFTER SAID CAR HAS BEEN BROUGHT TO A STANDSTILL WITHIN SAID BRAKING MEANS; AND MEANS FOR THEN MAINTAINING SAID BRAKE IN ITS OPEN POSITION UNTIL SAID CAR HAS CLEARED SAID BRAKING MEANS.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |