Patent US4591964A successfully refreshed from Google Patents.
Patent US1556934A successfully refreshed from Google Patents.
US1556934A
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US
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Muffler or silencer
Assignee: Individual
•
Filing: 1922-02-20
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Granted: 1925-10-13
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Expires: 1942-02-20
Abstract
No abstract record available.
Inventors
- 👤 Axel A Hilldring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:04
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N13/1855; F01N1/00; F01N1/08; F01N1/089; F01N13/1888; F01N13/1894; F01N2240/00; F01N2240/20; F01N2450/00; F01N2450/24; F01N2470/00; F01N2470/02; 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) | 1928-10-12 | 1929-04-13 | 1929-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-10-12 | 1933-04-13 | 1933-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-10-12 | 1937-04-13 | 1937-10-13 | $7700.00 | Window Closed / Lapsed |