Patent US2869671A successfully refreshed from Google Patents.
US2869671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine muffler
Assignee: Individual
•
Filing: 1953-08-31
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Granted: 1959-01-20
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Expires: 1973-08-31
Abstract
No abstract record available.
Inventors
- 👤 Karl E Schlachter
- 👤 Edward M Herrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:04
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/003; F01N1/006; F01N1/02; F01N1/04; F01N1/08; F01N1/083; F01N1/086; F01N1/089; F01N1/10; F01N1/12; F01N1/24; F01N2470/00; F01N2470/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1811762A
Cited
FR813127A
Cited
US2404617A
Cited
US2613758A
Cited
US2543461A
Cited
FR1017065A
Cited
US2671523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |