Patent US4186533A successfully refreshed from Google Patents.
US1542829A
Expired / Lapsed
US
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Muffler
Assignee: OLDBERG Manufacturing CO
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Filing: 1921-05-23
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Granted: 1925-06-23
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Expires: 1941-05-23
Abstract
No abstract record available.
Inventors
- 👤 Oldberg Virgil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:36
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N1/00; F01N1/08; F01N1/089; F01N2260/00; F01N2260/18; F01N2450/00; F01N2450/22; F01N2470/00; F01N2470/02; F01N2470/04; F01N2470/12; F01N2470/18; F01N2470/24; F01N2490/00; F01N2490/08
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) | 1928-06-22 | 1928-12-22 | 1929-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-22 | 1932-12-22 | 1933-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-22 | 1936-12-22 | 1937-06-23 | $7700.00 | Window Closed / Lapsed |