US3509904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel block assembly
Assignee: Westinghouse Air Brake Co
•
Filing: 1967-12-26
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Granted: 1970-05-05
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Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Paul E Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:04
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; F15B13/08; F15B13/0803; F15B13/0821; F15B13/0807; F15B13/0817; F15B13/0878; F15B13/0896; F16; F16L; F16L15/00; F16L15/08; F16L29/00; F16L41/00; F16L41/02; F16L41/03; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/8593; Y10T137/877; Y10T137/87885
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) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |