US2657777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum brake apparatus
Assignee: Individual
•
Filing: 1951-06-06
•
Granted: 1953-11-03
•
Expires: 1971-06-06
Abstract
No abstract record available.
Inventors
- 👤 Paul M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:34
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1548232A
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US1630809A
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US1565767A
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US1887428A
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US1962649A
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US2135071A
Cited
US2063793A
Cited
US2087305A
Cited
GB487909A
Cited
US2124900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |