Patent US1688488A successfully refreshed from Google Patents.
US1688488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler
Assignee: Individual
•
Filing: 1926-06-21
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Granted: 1928-10-23
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Expires: 1946-06-21
Abstract
No abstract record available.
Inventors
- 👤 Albert F Dormeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:19
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1872; F01N1/00; F01N1/08; F01N1/083; F01N13/1888; F01N2260/00; F01N2260/18; F01N2450/00; F01N2450/20; F01N2450/22; F01N2470/00; F01N2470/06; 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) | 1931-10-23 | 1932-04-23 | 1932-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-23 | 1936-04-23 | 1936-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-23 | 1940-04-23 | 1940-10-23 | $7700.00 | Window Closed / Lapsed |