US2131001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler
Assignee: BUFFALO PRESSED STEEL Co
•
Filing: 1936-11-13
•
Granted: 1938-09-20
•
Expires: 1956-11-13
Abstract
No abstract record available.
Inventors
- 👤 Felix E Prochnow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:46
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N1/00; F01N1/02; F01N2450/00; F01N2450/22; F01N2470/00; F01N2470/02; F01N2470/24; F01N2490/00; F01N2490/15; F01N2490/155; F01N2490/20
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) | 1941-09-19 | 1942-03-21 | 1942-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-19 | 1946-03-21 | 1946-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-19 | 1950-03-21 | 1950-09-20 | $7700.00 | Window Closed / Lapsed |