US3397516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter for air brake systems
Assignee: Berg Manufacturing and Sales Co
•
Filing: 1967-01-16
•
Granted: 1968-08-20
•
Expires: 1987-01-16
Abstract
No abstract record available.
Inventors
- 👤 Kobnick Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:19
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0012; B01D46/0004; B01D46/0084; B01D46/0087; B60; B60T; B60T17/00; B60T17/002; Y; Y10; Y10T; Y10T137/00; Y10T137/7069; Y10T137/7722; Y10T137/7738; Y10T137/7771
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |