US3390921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulating spring brake application and release valve
Assignee: Berg Manufacturing and Sales Co
•
Filing: 1966-08-17
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Granted: 1968-07-02
•
Expires: 1986-08-17
Abstract
No abstract record available.
Inventors
- 👤 Klimek Boleslaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:51
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/04; B60T15/041; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/87024; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/1896; Y10T74/20; Y10T74/20006; Y10T74/20576; Y10T74/20582; Y10T74/2063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1814565A
Cited
US1927700A
Cited
US2322518A
Cited
US2991662A
Cited
US3139769A
Cited
US3284142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |