US1878993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed air brake for obtaining alpha variable braking effect
Assignee: CARL HOLMBERGS MEK VERKST S AK
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Filing: 1930-02-14
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Granted: 1932-09-27
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Expires: 1950-02-14
Abstract
No abstract record available.
Inventors
- 👤 Anderberg Anders
- 👤 Anderberg Erik Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:56
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/08; B60T17/10
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) | 1935-09-27 | 1936-03-28 | 1936-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-27 | 1940-03-28 | 1940-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-27 | 1944-03-28 | 1944-09-27 | $7700.00 | Window Closed / Lapsed |