US1927947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler
Assignee: Westinghouse Air Brake Co
•
Filing: 1931-02-03
•
Granted: 1933-09-26
•
Expires: 1951-02-03
Abstract
No abstract record available.
Inventors
- 👤 George K Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:01
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0027; F04B39/0055; Y; Y10; Y10S; Y10S55/00; Y10S55/21; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
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) | 1936-09-25 | 1937-03-27 | 1937-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-09-25 | 1941-03-27 | 1941-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-09-25 | 1945-03-27 | 1945-09-26 | $7700.00 | Window Closed / Lapsed |