US3136509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad switch mechanisms
Assignee: American Brake Shoe Co
•
Filing: 1960-02-01
•
Granted: 1964-06-09
•
Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Oscar F Magnus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:51
CPC Classifications
B; B61; B61L; B61L5/00; B61L5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US797398A
Cited
US892770A
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US1875853A
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US1846809A
Cited
US2092828A
Cited
US2082933A
Cited
US2130444A
Cited
US2659812A
Cited
US2916879A
Cited
US3015464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |