US2251880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler and silencer construction
Assignee: HAYES IND Inc
•
Filing: 1936-04-24
•
Granted: 1941-08-05
•
Expires: 1956-04-24
Abstract
No abstract record available.
Inventors
- 👤 Beecher B Cary
- 👤 Hollerith Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:13
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N1/00; F01N1/003; F01N1/006; F01N1/02; F01N1/023; F01N2450/00; F01N2450/20; F01N2470/00; F01N2470/02; F01N2470/24; F01N2490/00; F01N2490/15; F01N2490/155
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1944-08-04 | 1945-02-03 | 1945-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-04 | 1949-02-03 | 1949-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-04 | 1953-02-03 | 1953-08-05 | $7700.00 | Window Closed / Lapsed |