US2243068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking system
Assignee: Transit Research Corp
•
Filing: 1937-07-26
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Granted: 1941-05-27
•
Expires: 1957-07-26
Abstract
No abstract record available.
Inventors
- 👤 Lebert E Blue
- 👤 Clarence F Hirshfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:05
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/58; B60T13/585; B60T13/586
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-05-26 | 1944-11-25 | 1945-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-05-26 | 1948-11-25 | 1949-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-05-26 | 1952-11-25 | 1953-05-27 | $7700.00 | Window Closed / Lapsed |