Patent US2582612A successfully refreshed from Google Patents.
US2582612A
Expired / Lapsed
US
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Trailer relay valve for vacuum brakes
Assignee: POWER BRAKE EQUIPMENT CO
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Filing: 1948-03-15
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Granted: 1952-01-15
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Expires: 1968-03-15
Abstract
No abstract record available.
Inventors
- 👤 Norman C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:36
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/18; B60T13/00; B60T13/10; B60T13/24; B60T13/26; B60T13/40; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2559; Y10T137/2564; Y10T137/2572; Y10T137/265; Y10T137/2663; Y10T137/8593; Y10T137/87169; Y10T137/87217; Y10T137/87225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |