US2491158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Buffer for railway cars
Assignee: Individual
•
Filing: 1944-09-18
•
Granted: 1949-12-13
•
Expires: 1964-09-18
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:10
CPC Classifications
B; B61; B61G; B61G11/00; B61G11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR459664A
Cited
US1555699A
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US1747238A
Cited
DE477324C
Cited
CH169215A
Cited
US2146015A
Cited
US2280428A
Cited
US2291831A
Cited
US2335847A
Cited
US2399110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |