US2800973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retroverted flow muffler
Assignee: Motors Liquidation Co
•
Filing: 1952-11-29
•
Granted: 1957-07-30
•
Expires: 1972-11-29
Abstract
No abstract record available.
Inventors
- 👤 Beecher B Cary
- 👤 Lloyd E Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:51
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/02; F01N1/08; F01N1/084; F01N2490/00; F01N2490/15; F01N2490/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305347A
Cited
GB190603354A
Cited
US2036138A
Cited
FR781087A
Cited
US2125449A
Cited
US2357791A
Cited
US2337300A
Cited
US2614647A
Cited
US2652128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |