US2547715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead-suspended car for race tracks
Assignee: Individual
•
Filing: 1947-07-24
•
Granted: 1951-04-03
•
Expires: 1967-07-24
Abstract
No abstract record available.
Inventors
- 👤 Robert A Massey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:53
CPC Classifications
B; B61; B61B; B61B3/00; B61B3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US495246A
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US506570A
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US331387A
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US911332A
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US973633A
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US1200393A
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US1455390A
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US1703496A
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US1802550A
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US1801001A
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US2242065A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |