US2577950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for indicating and recording the performance of electrically driven locomotives
Assignee: F N BARD
•
Filing: 1948-03-17
•
Granted: 1951-12-11
•
Expires: 1968-03-17
Abstract
No abstract record available.
Inventors
- 👤 Robert S Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:56
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1516809A
Cited
US1350355A
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US1190173A
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US1518214A
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US1826492A
Cited
US2325451A
Cited
US2317258A
Cited
US2326049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |